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Finding the Fourth Proportional to 557,356.55, 769,170.20 and 315,633.92

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Solution

The fourth proportional to 557,356.55, 769,170.20 and 315,633.92 is: 435,585.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    557,356.55 : 769,170.20 = 315,633.92 : x
  2. Step 2: Convert to fraction form
    557,356.55/769,170.20 = 315,633.92/x
  3. Step 3: Cross multiply
    557,356.55x = 769,170.20 × 315,633.92
  4. Step 4: Simplify right side
    557,356.55x = 242,776,199,949.16
  5. Step 5: Solve for x
    x = 242,776,199,949.16/557,356.55
  6. Step 6: Final answer
    x = 435,585.09

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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 (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.