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Finding the Fourth Proportional to 359,905.40, 539,210.10 and 172,503.80

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Solution

The fourth proportional to 359,905.40, 539,210.10 and 172,503.80 is: 258,445.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    359,905.40 : 539,210.10 = 172,503.80 : x
  2. Step 2: Convert to fraction form
    359,905.40/539,210.10 = 172,503.80/x
  3. Step 3: Cross multiply
    359,905.40x = 539,210.10 × 172,503.80
  4. Step 4: Simplify right side
    359,905.40x = 93,015,791,248.38
  5. Step 5: Solve for x
    x = 93,015,791,248.38/359,905.40
  6. Step 6: Final answer
    x = 258,445.11

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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.