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Finding the Fourth Proportional to 868,000.20, 1,302,000.30 and 779,645.40

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Solution

The fourth proportional to 868,000.20, 1,302,000.30 and 779,645.40 is: 1,169,468.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    868,000.20 : 1,302,000.30 = 779,645.40 : x
  2. Step 2: Convert to fraction form
    868,000.20/1,302,000.30 = 779,645.40/x
  3. Step 3: Cross multiply
    868,000.20x = 1,302,000.30 × 779,645.40
  4. Step 4: Simplify right side
    868,000.20x = 1,015,098,544,693.62
  5. Step 5: Solve for x
    x = 1,015,098,544,693.62/868,000.20
  6. Step 6: Final answer
    x = 1,169,468.10

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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.