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Finding the Fourth Proportional to 675,740.80, 932,510.40 and 389,260

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Solution

The fourth proportional to 675,740.80, 932,510.40 and 389,260 is: 537,171.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    675,740.80 : 932,510.40 = 389,260 : x
  2. Step 2: Convert to fraction form
    675,740.80/932,510.40 = 389,260/x
  3. Step 3: Cross multiply
    675,740.80x = 932,510.40 × 389,260
  4. Step 4: Simplify right side
    675,740.80x = 362,988,998,304
  5. Step 5: Solve for x
    x = 362,988,998,304/675,740.80
  6. Step 6: Final answer
    x = 537,171.94

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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.