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Finding the Fourth Proportional to 675,159.76, 931,719 and 388,575.28

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Solution

The fourth proportional to 675,159.76, 931,719 and 388,575.28 is: 536,233.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    675,159.76 : 931,719 = 388,575.28 : x
  2. Step 2: Convert to fraction form
    675,159.76/931,719 = 388,575.28/x
  3. Step 3: Cross multiply
    675,159.76x = 931,719 × 388,575.28
  4. Step 4: Simplify right side
    675,159.76x = 362,042,971,306.32
  5. Step 5: Solve for x
    x = 362,042,971,306.32/675,159.76
  6. Step 6: Final answer
    x = 536,233.04

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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.