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Finding the Fourth Proportional to 630,474.40, 945,711.60 and 578,864.80

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Solution

The fourth proportional to 630,474.40, 945,711.60 and 578,864.80 is: 868,297.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,474.40 : 945,711.60 = 578,864.80 : x
  2. Step 2: Convert to fraction form
    630,474.40/945,711.60 = 578,864.80/x
  3. Step 3: Cross multiply
    630,474.40x = 945,711.60 × 578,864.80
  4. Step 4: Simplify right side
    630,474.40x = 547,439,156,191.68
  5. Step 5: Solve for x
    x = 547,439,156,191.68/630,474.40
  6. Step 6: Final answer
    x = 868,297.20

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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.