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Finding the Fourth Proportional to 428,956.38, 592,030.62 and 238,031.28

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Solution

The fourth proportional to 428,956.38, 592,030.62 and 238,031.28 is: 328,522.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,956.38 : 592,030.62 = 238,031.28 : x
  2. Step 2: Convert to fraction form
    428,956.38/592,030.62 = 238,031.28/x
  3. Step 3: Cross multiply
    428,956.38x = 592,030.62 × 238,031.28
  4. Step 4: Simplify right side
    428,956.38x = 140,921,806,277.79
  5. Step 5: Solve for x
    x = 140,921,806,277.79/428,956.38
  6. Step 6: Final answer
    x = 328,522.46

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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.