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Finding the Fourth Proportional to 768,672.60, 1,153,008.90 and 485,237.40

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Solution

The fourth proportional to 768,672.60, 1,153,008.90 and 485,237.40 is: 727,856.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    768,672.60 : 1,153,008.90 = 485,237.40 : x
  2. Step 2: Convert to fraction form
    768,672.60/1,153,008.90 = 485,237.40/x
  3. Step 3: Cross multiply
    768,672.60x = 1,153,008.90 × 485,237.40
  4. Step 4: Simplify right side
    768,672.60x = 559,483,040,812.86
  5. Step 5: Solve for x
    x = 559,483,040,812.86/768,672.60
  6. Step 6: Final answer
    x = 727,856.10

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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.