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Finding the Fourth Proportional to 660,368.90, 990,553.35 and 656,432.30

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Solution

The fourth proportional to 660,368.90, 990,553.35 and 656,432.30 is: 984,648.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,368.90 : 990,553.35 = 656,432.30 : x
  2. Step 2: Convert to fraction form
    660,368.90/990,553.35 = 656,432.30/x
  3. Step 3: Cross multiply
    660,368.90x = 990,553.35 × 656,432.30
  4. Step 4: Simplify right side
    660,368.90x = 650,231,213,813.21
  5. Step 5: Solve for x
    x = 650,231,213,813.21/660,368.90
  6. Step 6: Final answer
    x = 984,648.45

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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.