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Finding the Fourth Proportional to 643,802.88, 888,437.76 and 357,323.52

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Solution

The fourth proportional to 643,802.88, 888,437.76 and 357,323.52 is: 493,100.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,802.88 : 888,437.76 = 357,323.52 : x
  2. Step 2: Convert to fraction form
    643,802.88/888,437.76 = 357,323.52/x
  3. Step 3: Cross multiply
    643,802.88x = 888,437.76 × 357,323.52
  4. Step 4: Simplify right side
    643,802.88x = 317,459,707,704.12
  5. Step 5: Solve for x
    x = 317,459,707,704.12/643,802.88
  6. Step 6: Final answer
    x = 493,100.79

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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.