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Finding the Fourth Proportional to 519,317.80, 778,976.70 and 491,761.60

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Solution

The fourth proportional to 519,317.80, 778,976.70 and 491,761.60 is: 737,642.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,317.80 : 778,976.70 = 491,761.60 : x
  2. Step 2: Convert to fraction form
    519,317.80/778,976.70 = 491,761.60/x
  3. Step 3: Cross multiply
    519,317.80x = 778,976.70 × 491,761.60
  4. Step 4: Simplify right side
    519,317.80x = 383,070,828,354.72
  5. Step 5: Solve for x
    x = 383,070,828,354.72/519,317.80
  6. Step 6: Final answer
    x = 737,642.40

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Double scale
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Similar ratio
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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.