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Finding the Fourth Proportional to 687,732.80, 1,029,630.90 and 609,000.80

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Solution

The fourth proportional to 687,732.80, 1,029,630.90 and 609,000.80 is: 911,758.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,732.80 : 1,029,630.90 = 609,000.80 : x
  2. Step 2: Convert to fraction form
    687,732.80/1,029,630.90 = 609,000.80/x
  3. Step 3: Cross multiply
    687,732.80x = 1,029,630.90 × 609,000.80
  4. Step 4: Simplify right side
    687,732.80x = 627,046,041,804.72
  5. Step 5: Solve for x
    x = 627,046,041,804.72/687,732.80
  6. Step 6: Final answer
    x = 911,758.23

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1.5x scale

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.