Home / 660,972.38-912,139.50-374,547.20

Finding the Fourth Proportional to 660,972.38, 912,139.50 and 374,547.20

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Solution

The fourth proportional to 660,972.38, 912,139.50 and 374,547.20 is: 516,873.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,972.38 : 912,139.50 = 374,547.20 : x
  2. Step 2: Convert to fraction form
    660,972.38/912,139.50 = 374,547.20/x
  3. Step 3: Cross multiply
    660,972.38x = 912,139.50 × 374,547.20
  4. Step 4: Simplify right side
    660,972.38x = 341,639,295,734.40
  5. Step 5: Solve for x
    x = 341,639,295,734.40/660,972.38
  6. Step 6: Final answer
    x = 516,873.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.