Home / 1,250.17-1,875.27-428.45

Finding the Fourth Proportional to 1,250.17, 1,875.27 and 428.45

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Solution

The fourth proportional to 1,250.17, 1,875.27 and 428.45 is: 642.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,250.17 : 1,875.27 = 428.45 : x
  2. Step 2: Convert to fraction form
    1,250.17/1,875.27 = 428.45/x
  3. Step 3: Cross multiply
    1,250.17x = 1,875.27 × 428.45
  4. Step 4: Simplify right side
    1,250.17x = 803,459.43
  5. Step 5: Solve for x
    x = 803,459.43/1,250.17
  6. Step 6: Final answer
    x = 642.68

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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.