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Finding the Fourth Proportional to 520,456.60, 780,101.70 and 267,639.40

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Solution

The fourth proportional to 520,456.60, 780,101.70 and 267,639.40 is: 401,159.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,456.60 : 780,101.70 = 267,639.40 : x
  2. Step 2: Convert to fraction form
    520,456.60/780,101.70 = 267,639.40/x
  3. Step 3: Cross multiply
    520,456.60x = 780,101.70 × 267,639.40
  4. Step 4: Simplify right side
    520,456.60x = 208,785,950,926.98
  5. Step 5: Solve for x
    x = 208,785,950,926.98/520,456.60
  6. Step 6: Final answer
    x = 401,159.20

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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.