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Finding the Fourth Proportional to 858,897.10, 1,288,345.65 and 503,728.30

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Solution

The fourth proportional to 858,897.10, 1,288,345.65 and 503,728.30 is: 755,592.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    858,897.10 : 1,288,345.65 = 503,728.30 : x
  2. Step 2: Convert to fraction form
    858,897.10/1,288,345.65 = 503,728.30/x
  3. Step 3: Cross multiply
    858,897.10x = 1,288,345.65 × 503,728.30
  4. Step 4: Simplify right side
    858,897.10x = 648,976,164,086.90
  5. Step 5: Solve for x
    x = 648,976,164,086.90/858,897.10
  6. Step 6: Final answer
    x = 755,592.45

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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.