Home / 1,411.67-2,118.02-631.61

Finding the Fourth Proportional to 1,411.67, 2,118.02 and 631.61

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Solution

The fourth proportional to 1,411.67, 2,118.02 and 631.61 is: 947.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,411.67 : 2,118.02 = 631.61 : x
  2. Step 2: Convert to fraction form
    1,411.67/2,118.02 = 631.61/x
  3. Step 3: Cross multiply
    1,411.67x = 2,118.02 × 631.61
  4. Step 4: Simplify right side
    1,411.67x = 1,337,762.61
  5. Step 5: Solve for x
    x = 1,337,762.61/1,411.67
  6. Step 6: Final answer
    x = 947.65

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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.