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Finding the Fourth Proportional to 656,124.40, 984,647.40 and 420,041.20

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Solution

The fourth proportional to 656,124.40, 984,647.40 and 420,041.20 is: 630,356.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,124.40 : 984,647.40 = 420,041.20 : x
  2. Step 2: Convert to fraction form
    656,124.40/984,647.40 = 420,041.20/x
  3. Step 3: Cross multiply
    656,124.40x = 984,647.40 × 420,041.20
  4. Step 4: Simplify right side
    656,124.40x = 413,592,475,472.88
  5. Step 5: Solve for x
    x = 413,592,475,472.88/656,124.40
  6. Step 6: Final answer
    x = 630,356.80

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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.