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Finding the Fourth Proportional to 661,057.04, 991,585.89 and 436,364.96

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Solution

The fourth proportional to 661,057.04, 991,585.89 and 436,364.96 is: 654,547.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,057.04 : 991,585.89 = 436,364.96 : x
  2. Step 2: Convert to fraction form
    661,057.04/991,585.89 = 436,364.96/x
  3. Step 3: Cross multiply
    661,057.04x = 991,585.89 × 436,364.96
  4. Step 4: Simplify right side
    661,057.04x = 432,693,337,226.41
  5. Step 5: Solve for x
    x = 432,693,337,226.41/661,057.04
  6. Step 6: Final answer
    x = 654,547.66

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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.