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Finding the Fourth Proportional to 678,187.60, 1,016,406.60 and 519,630.10

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Solution

The fourth proportional to 678,187.60, 1,016,406.60 and 519,630.10 is: 778,774.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,187.60 : 1,016,406.60 = 519,630.10 : x
  2. Step 2: Convert to fraction form
    678,187.60/1,016,406.60 = 519,630.10/x
  3. Step 3: Cross multiply
    678,187.60x = 1,016,406.60 × 519,630.10
  4. Step 4: Simplify right side
    678,187.60x = 528,155,463,198.66
  5. Step 5: Solve for x
    x = 528,155,463,198.66/678,187.60
  6. Step 6: Final answer
    x = 778,774.87

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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.