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Finding the Fourth Proportional to 538,313.40, 807,470.10 and 257,686.20

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Solution

The fourth proportional to 538,313.40, 807,470.10 and 257,686.20 is: 386,529.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    538,313.40 : 807,470.10 = 257,686.20 : x
  2. Step 2: Convert to fraction form
    538,313.40/807,470.10 = 257,686.20/x
  3. Step 3: Cross multiply
    538,313.40x = 807,470.10 × 257,686.20
  4. Step 4: Simplify right side
    538,313.40x = 208,073,901,682.62
  5. Step 5: Solve for x
    x = 208,073,901,682.62/538,313.40
  6. Step 6: Final answer
    x = 386,529.30

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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.