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Finding the Fourth Proportional to 516,165.40, 774,248.10 and 279,969.40

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Solution

The fourth proportional to 516,165.40, 774,248.10 and 279,969.40 is: 419,954.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    516,165.40 : 774,248.10 = 279,969.40 : x
  2. Step 2: Convert to fraction form
    516,165.40/774,248.10 = 279,969.40/x
  3. Step 3: Cross multiply
    516,165.40x = 774,248.10 × 279,969.40
  4. Step 4: Simplify right side
    516,165.40x = 216,765,776,008.14
  5. Step 5: Solve for x
    x = 216,765,776,008.14/516,165.40
  6. Step 6: Final answer
    x = 419,954.10

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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.