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Finding the Fourth Proportional to 516,326.13, 712,527.74 and 286,920.77

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Solution

The fourth proportional to 516,326.13, 712,527.74 and 286,920.77 is: 395,949.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    516,326.13 : 712,527.74 = 286,920.77 : x
  2. Step 2: Convert to fraction form
    516,326.13/712,527.74 = 286,920.77/x
  3. Step 3: Cross multiply
    516,326.13x = 712,527.74 × 286,920.77
  4. Step 4: Simplify right side
    516,326.13x = 204,439,003,885.87
  5. Step 5: Solve for x
    x = 204,439,003,885.87/516,326.13
  6. Step 6: Final answer
    x = 395,949.37

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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.