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Finding the Fourth Proportional to 771,215.60, 1,154,490.60 and 687,234.80

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Solution

The fourth proportional to 771,215.60, 1,154,490.60 and 687,234.80 is: 1,028,773.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    771,215.60 : 1,154,490.60 = 687,234.80 : x
  2. Step 2: Convert to fraction form
    771,215.60/1,154,490.60 = 687,234.80/x
  3. Step 3: Cross multiply
    771,215.60x = 1,154,490.60 × 687,234.80
  4. Step 4: Simplify right side
    771,215.60x = 793,406,116,592.88
  5. Step 5: Solve for x
    x = 793,406,116,592.88/771,215.60
  6. Step 6: Final answer
    x = 1,028,773.43

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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.