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Finding the Fourth Proportional to 517,411.64, 714,007.12 and 287,962.44

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Solution

The fourth proportional to 517,411.64, 714,007.12 and 287,962.44 is: 397,376.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    517,411.64 : 714,007.12 = 287,962.44 : x
  2. Step 2: Convert to fraction form
    517,411.64/714,007.12 = 287,962.44/x
  3. Step 3: Cross multiply
    517,411.64x = 714,007.12 × 287,962.44
  4. Step 4: Simplify right side
    517,411.64x = 205,607,232,452.57
  5. Step 5: Solve for x
    x = 205,607,232,452.57/517,411.64
  6. Step 6: Final answer
    x = 397,376.51

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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.