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Finding the Fourth Proportional to 579,407.70, 869,111.55 and 486,095.70

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Solution

The fourth proportional to 579,407.70, 869,111.55 and 486,095.70 is: 729,143.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    579,407.70 : 869,111.55 = 486,095.70 : x
  2. Step 2: Convert to fraction form
    579,407.70/869,111.55 = 486,095.70/x
  3. Step 3: Cross multiply
    579,407.70x = 869,111.55 × 486,095.70
  4. Step 4: Simplify right side
    579,407.70x = 422,471,387,275.34
  5. Step 5: Solve for x
    x = 422,471,387,275.34/579,407.70
  6. Step 6: Final answer
    x = 729,143.55

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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.