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Finding the Fourth Proportional to 578,465.20, 867,697.80 and 389,508.40

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Solution

The fourth proportional to 578,465.20, 867,697.80 and 389,508.40 is: 584,262.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    578,465.20 : 867,697.80 = 389,508.40 : x
  2. Step 2: Convert to fraction form
    578,465.20/867,697.80 = 389,508.40/x
  3. Step 3: Cross multiply
    578,465.20x = 867,697.80 × 389,508.40
  4. Step 4: Simplify right side
    578,465.20x = 337,975,581,761.52
  5. Step 5: Solve for x
    x = 337,975,581,761.52/578,465.20
  6. Step 6: Final answer
    x = 584,262.60

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Similar ratio
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1.5x scale

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.