Home / 661,538.32-991,055.36-390,856.96

Finding the Fourth Proportional to 661,538.32, 991,055.36 and 390,856.96

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Solution

The fourth proportional to 661,538.32, 991,055.36 and 390,856.96 is: 585,545.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,538.32 : 991,055.36 = 390,856.96 : x
  2. Step 2: Convert to fraction form
    661,538.32/991,055.36 = 390,856.96/x
  3. Step 3: Cross multiply
    661,538.32x = 991,055.36 × 390,856.96
  4. Step 4: Simplify right side
    661,538.32x = 387,360,885,201.31
  5. Step 5: Solve for x
    x = 387,360,885,201.31/661,538.32
  6. Step 6: Final answer
    x = 585,545.65

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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.