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Finding the Fourth Proportional to 657,660.54, 907,511.40 and 385,678.41

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Solution

The fourth proportional to 657,660.54, 907,511.40 and 385,678.41 is: 532,200.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    657,660.54 : 907,511.40 = 385,678.41 : x
  2. Step 2: Convert to fraction form
    657,660.54/907,511.40 = 385,678.41/x
  3. Step 3: Cross multiply
    657,660.54x = 907,511.40 × 385,678.41
  4. Step 4: Simplify right side
    657,660.54x = 350,007,553,808.87
  5. Step 5: Solve for x
    x = 350,007,553,808.87/657,660.54
  6. Step 6: Final answer
    x = 532,200.93

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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.