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Finding the Fourth Proportional to 578,465.60, 867,698.40 and 389,508.80

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Solution

The fourth proportional to 578,465.60, 867,698.40 and 389,508.80 is: 584,263.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    578,465.60 : 867,698.40 = 389,508.80 : x
  2. Step 2: Convert to fraction form
    578,465.60/867,698.40 = 389,508.80/x
  3. Step 3: Cross multiply
    578,465.60x = 867,698.40 × 389,508.80
  4. Step 4: Simplify right side
    578,465.60x = 337,976,162,545.92
  5. Step 5: Solve for x
    x = 337,976,162,545.92/578,465.60
  6. Step 6: Final answer
    x = 584,263.20

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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.