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Finding the Fourth Proportional to 438,635.20, 657,952.80 and 376,427.20

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Solution

The fourth proportional to 438,635.20, 657,952.80 and 376,427.20 is: 564,640.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,635.20 : 657,952.80 = 376,427.20 : x
  2. Step 2: Convert to fraction form
    438,635.20/657,952.80 = 376,427.20/x
  3. Step 3: Cross multiply
    438,635.20x = 657,952.80 × 376,427.20
  4. Step 4: Simplify right side
    438,635.20x = 247,671,330,236.16
  5. Step 5: Solve for x
    x = 247,671,330,236.16/438,635.20
  6. Step 6: Final answer
    x = 564,640.80

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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.