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Finding the Fourth Proportional to 410,927.40, 616,391.10 and 115,439.40

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Solution

The fourth proportional to 410,927.40, 616,391.10 and 115,439.40 is: 173,159.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    410,927.40 : 616,391.10 = 115,439.40 : x
  2. Step 2: Convert to fraction form
    410,927.40/616,391.10 = 115,439.40/x
  3. Step 3: Cross multiply
    410,927.40x = 616,391.10 × 115,439.40
  4. Step 4: Simplify right side
    410,927.40x = 71,155,818,749.34
  5. Step 5: Solve for x
    x = 71,155,818,749.34/410,927.40
  6. Step 6: Final answer
    x = 173,159.10

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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.