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Finding the Fourth Proportional to 640,562.28, 883,937.52 and 354,065.28

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Solution

The fourth proportional to 640,562.28, 883,937.52 and 354,065.28 is: 488,588.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,562.28 : 883,937.52 = 354,065.28 : x
  2. Step 2: Convert to fraction form
    640,562.28/883,937.52 = 354,065.28/x
  3. Step 3: Cross multiply
    640,562.28x = 883,937.52 × 354,065.28
  4. Step 4: Simplify right side
    640,562.28x = 312,971,585,521.31
  5. Step 5: Solve for x
    x = 312,971,585,521.31/640,562.28
  6. Step 6: Final answer
    x = 488,588.85

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.