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Finding the Fourth Proportional to 643,497.43, 888,014.63 and 357,011.37

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Solution

The fourth proportional to 643,497.43, 888,014.63 and 357,011.37 is: 492,669.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,497.43 : 888,014.63 = 357,011.37 : x
  2. Step 2: Convert to fraction form
    643,497.43/888,014.63 = 357,011.37/x
  3. Step 3: Cross multiply
    643,497.43x = 888,014.63 × 357,011.37
  4. Step 4: Simplify right side
    643,497.43x = 317,031,319,636.34
  5. Step 5: Solve for x
    x = 317,031,319,636.34/643,497.43
  6. Step 6: Final answer
    x = 492,669.13

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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.