Home / 1,405.06-1,937.85-1,031.62

Finding the Fourth Proportional to 1,405.06, 1,937.85 and 1,031.62

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Solution

The fourth proportional to 1,405.06, 1,937.85 and 1,031.62 is: 1,422.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,405.06 : 1,937.85 = 1,031.62 : x
  2. Step 2: Convert to fraction form
    1,405.06/1,937.85 = 1,031.62/x
  3. Step 3: Cross multiply
    1,405.06x = 1,937.85 × 1,031.62
  4. Step 4: Simplify right side
    1,405.06x = 1,999,124.82
  5. Step 5: Solve for x
    x = 1,999,124.82/1,405.06
  6. Step 6: Final answer
    x = 1,422.80

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.