Home / 1,411.90-2,117.76-631.96

Finding the Fourth Proportional to 1,411.90, 2,117.76 and 631.96

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Solution

The fourth proportional to 1,411.90, 2,117.76 and 631.96 is: 947.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,411.90 : 2,117.76 = 631.96 : x
  2. Step 2: Convert to fraction form
    1,411.90/2,117.76 = 631.96/x
  3. Step 3: Cross multiply
    1,411.90x = 2,117.76 × 631.96
  4. Step 4: Simplify right side
    1,411.90x = 1,338,339.61
  5. Step 5: Solve for x
    x = 1,338,339.61/1,411.90
  6. Step 6: Final answer
    x = 947.90

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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.