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Finding the Fourth Proportional to 579,275.80, 868,913.70 and 509,234.20

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Solution

The fourth proportional to 579,275.80, 868,913.70 and 509,234.20 is: 763,851.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    579,275.80 : 868,913.70 = 509,234.20 : x
  2. Step 2: Convert to fraction form
    579,275.80/868,913.70 = 509,234.20/x
  3. Step 3: Cross multiply
    579,275.80x = 868,913.70 × 509,234.20
  4. Step 4: Simplify right side
    579,275.80x = 442,480,572,888.54
  5. Step 5: Solve for x
    x = 442,480,572,888.54/579,275.80
  6. Step 6: Final answer
    x = 763,851.30

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Half scale
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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.