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Finding the Fourth Proportional to 661,532.82, 991,047.12 and 390,851.46

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Solution

The fourth proportional to 661,532.82, 991,047.12 and 390,851.46 is: 585,537.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,532.82 : 991,047.12 = 390,851.46 : x
  2. Step 2: Convert to fraction form
    661,532.82/991,047.12 = 390,851.46/x
  3. Step 3: Cross multiply
    661,532.82x = 991,047.12 × 390,851.46
  4. Step 4: Simplify right side
    661,532.82x = 387,352,213,780.80
  5. Step 5: Solve for x
    x = 387,352,213,780.80/661,532.82
  6. Step 6: Final answer
    x = 585,537.41

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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.