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Finding the Fourth Proportional to 457,682.40, 685,141.20 and 402,386.40

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Solution

The fourth proportional to 457,682.40, 685,141.20 and 402,386.40 is: 602,364.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    457,682.40 : 685,141.20 = 402,386.40 : x
  2. Step 2: Convert to fraction form
    457,682.40/685,141.20 = 402,386.40/x
  3. Step 3: Cross multiply
    457,682.40x = 685,141.20 × 402,386.40
  4. Step 4: Simplify right side
    457,682.40x = 275,691,500,959.68
  5. Step 5: Solve for x
    x = 275,691,500,959.68/457,682.40
  6. Step 6: Final answer
    x = 602,364.22

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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.