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Finding the Fourth Proportional to 418,428.95, 627,637.95 and 102,888.59

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Solution

The fourth proportional to 418,428.95, 627,637.95 and 102,888.59 is: 154,331.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,428.95 : 627,637.95 = 102,888.59 : x
  2. Step 2: Convert to fraction form
    418,428.95/627,637.95 = 102,888.59/x
  3. Step 3: Cross multiply
    418,428.95x = 627,637.95 × 102,888.59
  4. Step 4: Simplify right side
    418,428.95x = 64,576,780,567.80
  5. Step 5: Solve for x
    x = 64,576,780,567.80/418,428.95
  6. Step 6: Final answer
    x = 154,331.53

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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.