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Finding the Fourth Proportional to 643,701.04, 888,337.76 and 357,223.48

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Solution

The fourth proportional to 643,701.04, 888,337.76 and 357,223.48 is: 492,985.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,701.04 : 888,337.76 = 357,223.48 : x
  2. Step 2: Convert to fraction form
    643,701.04/888,337.76 = 357,223.48/x
  3. Step 3: Cross multiply
    643,701.04x = 888,337.76 × 357,223.48
  4. Step 4: Simplify right side
    643,701.04x = 317,335,106,042.61
  5. Step 5: Solve for x
    x = 317,335,106,042.61/643,701.04
  6. Step 6: Final answer
    x = 492,985.23

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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.