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Finding the Fourth Proportional to 572,769.20, 860,071.80 and 455,416.40

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Solution

The fourth proportional to 572,769.20, 860,071.80 and 455,416.40 is: 683,854.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    572,769.20 : 860,071.80 = 455,416.40 : x
  2. Step 2: Convert to fraction form
    572,769.20/860,071.80 = 455,416.40/x
  3. Step 3: Cross multiply
    572,769.20x = 860,071.80 × 455,416.40
  4. Step 4: Simplify right side
    572,769.20x = 391,690,802,897.52
  5. Step 5: Solve for x
    x = 391,690,802,897.52/572,769.20
  6. Step 6: Final answer
    x = 683,854.51

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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.