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Finding the Fourth Proportional to 409,761.40, 615,141.30 and 260,001.40

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Solution

The fourth proportional to 409,761.40, 615,141.30 and 260,001.40 is: 390,318.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    409,761.40 : 615,141.30 = 260,001.40 : x
  2. Step 2: Convert to fraction form
    409,761.40/615,141.30 = 260,001.40/x
  3. Step 3: Cross multiply
    409,761.40x = 615,141.30 × 260,001.40
  4. Step 4: Simplify right side
    409,761.40x = 159,937,599,197.82
  5. Step 5: Solve for x
    x = 159,937,599,197.82/409,761.40
  6. Step 6: Final answer
    x = 390,318.85

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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.