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Finding the Fourth Proportional to 438,045.30, 657,067.95 and 105,621.30

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Solution

The fourth proportional to 438,045.30, 657,067.95 and 105,621.30 is: 158,431.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,045.30 : 657,067.95 = 105,621.30 : x
  2. Step 2: Convert to fraction form
    438,045.30/657,067.95 = 105,621.30/x
  3. Step 3: Cross multiply
    438,045.30x = 657,067.95 × 105,621.30
  4. Step 4: Simplify right side
    438,045.30x = 69,400,371,067.34
  5. Step 5: Solve for x
    x = 69,400,371,067.34/438,045.30
  6. Step 6: Final answer
    x = 158,431.95

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.