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Finding the Fourth Proportional to 1,250.08, 1,875.38 and 428.13

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Solution

The fourth proportional to 1,250.08, 1,875.38 and 428.13 is: 642.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,250.08 : 1,875.38 = 428.13 : x
  2. Step 2: Convert to fraction form
    1,250.08/1,875.38 = 428.13/x
  3. Step 3: Cross multiply
    1,250.08x = 1,875.38 × 428.13
  4. Step 4: Simplify right side
    1,250.08x = 802,911.83
  5. Step 5: Solve for x
    x = 802,911.83/1,250.08
  6. Step 6: Final answer
    x = 642.29

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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.