Home / 687,780.30-1,029,702.15-609,048.30

Finding the Fourth Proportional to 687,780.30, 1,029,702.15 and 609,048.30

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Solution

The fourth proportional to 687,780.30, 1,029,702.15 and 609,048.30 is: 911,829.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,780.30 : 1,029,702.15 = 609,048.30 : x
  2. Step 2: Convert to fraction form
    687,780.30/1,029,702.15 = 609,048.30/x
  3. Step 3: Cross multiply
    687,780.30x = 1,029,702.15 × 609,048.30
  4. Step 4: Simplify right side
    687,780.30x = 627,138,343,963.85
  5. Step 5: Solve for x
    x = 627,138,343,963.85/687,780.30
  6. Step 6: Final answer
    x = 911,829.47

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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.