Home / 1,279,152,238.80-1,918,728,358.20-1,258,744,904.40

Finding the Fourth Proportional to 1,279,152,238.80, 1,918,728,358.20 and 1,258,744,904.40

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Solution

The fourth proportional to 1,279,152,238.80, 1,918,728,358.20 and 1,258,744,904.40 is: 1,888,117,356.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,279,152,238.80 : 1,918,728,358.20 = 1,258,744,904.40 : x
  2. Step 2: Convert to fraction form
    1,279,152,238.80/1,918,728,358.20 = 1,258,744,904.40/x
  3. Step 3: Cross multiply
    1,279,152,238.80x = 1,918,728,358.20 × 1,258,744,904.40
  4. Step 4: Simplify right side
    1,279,152,238.80x = 2,415,189,543,812,028,416
  5. Step 5: Solve for x
    x = 2,415,189,543,812,028,416/1,279,152,238.80
  6. Step 6: Final answer
    x = 1,888,117,356.60

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.