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Finding the Fourth Proportional to 640,329.90, 883,689.27 and 368,439.10

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Solution

The fourth proportional to 640,329.90, 883,689.27 and 368,439.10 is: 508,465.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,329.90 : 883,689.27 = 368,439.10 : x
  2. Step 2: Convert to fraction form
    640,329.90/883,689.27 = 368,439.10/x
  3. Step 3: Cross multiply
    640,329.90x = 883,689.27 × 368,439.10
  4. Step 4: Simplify right side
    640,329.90x = 325,585,679,318.46
  5. Step 5: Solve for x
    x = 325,585,679,318.46/640,329.90
  6. Step 6: Final answer
    x = 508,465.53

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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.