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Finding the Fourth Proportional to 643,670.46, 888,274.92 and 357,209.10

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Solution

The fourth proportional to 643,670.46, 888,274.92 and 357,209.10 is: 492,953.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,670.46 : 888,274.92 = 357,209.10 : x
  2. Step 2: Convert to fraction form
    643,670.46/888,274.92 = 357,209.10/x
  3. Step 3: Cross multiply
    643,670.46x = 888,274.92 × 357,209.10
  4. Step 4: Simplify right side
    643,670.46x = 317,299,884,725.77
  5. Step 5: Solve for x
    x = 317,299,884,725.77/643,670.46
  6. Step 6: Final answer
    x = 492,953.93

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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.