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Finding the Fourth Proportional to 643,525.02, 888,064.68 and 357,044.40

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Solution

The fourth proportional to 643,525.02, 888,064.68 and 357,044.40 is: 492,721.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,525.02 : 888,064.68 = 357,044.40 : x
  2. Step 2: Convert to fraction form
    643,525.02/888,064.68 = 357,044.40/x
  3. Step 3: Cross multiply
    643,525.02x = 888,064.68 × 357,044.40
  4. Step 4: Simplify right side
    643,525.02x = 317,078,520,831.79
  5. Step 5: Solve for x
    x = 317,078,520,831.79/643,525.02
  6. Step 6: Final answer
    x = 492,721.36

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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.