Home / 912,410.40-1,368,032.40-380,143.20

Finding the Fourth Proportional to 912,410.40, 1,368,032.40 and 380,143.20

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Solution

The fourth proportional to 912,410.40, 1,368,032.40 and 380,143.20 is: 569,971.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    912,410.40 : 1,368,032.40 = 380,143.20 : x
  2. Step 2: Convert to fraction form
    912,410.40/1,368,032.40 = 380,143.20/x
  3. Step 3: Cross multiply
    912,410.40x = 1,368,032.40 × 380,143.20
  4. Step 4: Simplify right side
    912,410.40x = 520,048,214,239.68
  5. Step 5: Solve for x
    x = 520,048,214,239.68/912,410.40
  6. Step 6: Final answer
    x = 569,971.82

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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.