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Finding the Fourth Proportional to 658,421.10, 987,959.70 and 374,329.80

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Solution

The fourth proportional to 658,421.10, 987,959.70 and 374,329.80 is: 561,681.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    658,421.10 : 987,959.70 = 374,329.80 : x
  2. Step 2: Convert to fraction form
    658,421.10/987,959.70 = 374,329.80/x
  3. Step 3: Cross multiply
    658,421.10x = 987,959.70 × 374,329.80
  4. Step 4: Simplify right side
    658,421.10x = 369,822,756,909.06
  5. Step 5: Solve for x
    x = 369,822,756,909.06/658,421.10
  6. Step 6: Final answer
    x = 561,681.21

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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.