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Finding the Fourth Proportional to 678,833.60, 1,017,375.60 and 520,276.10

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Solution

The fourth proportional to 678,833.60, 1,017,375.60 and 520,276.10 is: 779,743.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,833.60 : 1,017,375.60 = 520,276.10 : x
  2. Step 2: Convert to fraction form
    678,833.60/1,017,375.60 = 520,276.10/x
  3. Step 3: Cross multiply
    678,833.60x = 1,017,375.60 × 520,276.10
  4. Step 4: Simplify right side
    678,833.60x = 529,316,209,403.16
  5. Step 5: Solve for x
    x = 529,316,209,403.16/678,833.60
  6. Step 6: Final answer
    x = 779,743.68

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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.