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Finding the Fourth Proportional to 688,812.72, 950,572.95 and 378,728.43

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Solution

The fourth proportional to 688,812.72, 950,572.95 and 378,728.43 is: 522,651.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    688,812.72 : 950,572.95 = 378,728.43 : x
  2. Step 2: Convert to fraction form
    688,812.72/950,572.95 = 378,728.43/x
  3. Step 3: Cross multiply
    688,812.72x = 950,572.95 × 378,728.43
  4. Step 4: Simplify right side
    688,812.72x = 360,009,000,953.97
  5. Step 5: Solve for x
    x = 360,009,000,953.97/688,812.72
  6. Step 6: Final answer
    x = 522,651.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.