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Finding the Fourth Proportional to 768,157.83, 1,060,557.10 and 687,446.60

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Solution

The fourth proportional to 768,157.83, 1,060,557.10 and 687,446.60 is: 949,123.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    768,157.83 : 1,060,557.10 = 687,446.60 : x
  2. Step 2: Convert to fraction form
    768,157.83/1,060,557.10 = 687,446.60/x
  3. Step 3: Cross multiply
    768,157.83x = 1,060,557.10 × 687,446.60
  4. Step 4: Simplify right side
    768,157.83x = 729,076,365,479.46
  5. Step 5: Solve for x
    x = 729,076,365,479.46/768,157.83
  6. Step 6: Final answer
    x = 949,123.13

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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.