Home / 420,291,145.60-630,436,718.40-259,048,009.60

Finding the Fourth Proportional to 420,291,145.60, 630,436,718.40 and 259,048,009.60

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Solution

The fourth proportional to 420,291,145.60, 630,436,718.40 and 259,048,009.60 is: 388,572,014.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,291,145.60 : 630,436,718.40 = 259,048,009.60 : x
  2. Step 2: Convert to fraction form
    420,291,145.60/630,436,718.40 = 259,048,009.60/x
  3. Step 3: Cross multiply
    420,291,145.60x = 630,436,718.40 × 259,048,009.60
  4. Step 4: Simplify right side
    420,291,145.60x = 163,313,377,080,275,680
  5. Step 5: Solve for x
    x = 163,313,377,080,275,680/420,291,145.60
  6. Step 6: Final answer
    x = 388,572,014.40

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Similar ratio
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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.