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Finding the Fourth Proportional to 634,045.28, 875,072 and 392,405.60

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Solution

The fourth proportional to 634,045.28, 875,072 and 392,405.60 is: 541,575.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    634,045.28 : 875,072 = 392,405.60 : x
  2. Step 2: Convert to fraction form
    634,045.28/875,072 = 392,405.60/x
  3. Step 3: Cross multiply
    634,045.28x = 875,072 × 392,405.60
  4. Step 4: Simplify right side
    634,045.28x = 343,383,153,203.20
  5. Step 5: Solve for x
    x = 343,383,153,203.20/634,045.28
  6. Step 6: Final answer
    x = 541,575.13

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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.