Home / 1,470.24-2,029.10-840.85

Finding the Fourth Proportional to 1,470.24, 2,029.10 and 840.85

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Solution

The fourth proportional to 1,470.24, 2,029.10 and 840.85 is: 1,160.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,470.24 : 2,029.10 = 840.85 : x
  2. Step 2: Convert to fraction form
    1,470.24/2,029.10 = 840.85/x
  3. Step 3: Cross multiply
    1,470.24x = 2,029.10 × 840.85
  4. Step 4: Simplify right side
    1,470.24x = 1,706,159.46
  5. Step 5: Solve for x
    x = 1,706,159.46/1,470.24
  6. Step 6: Final answer
    x = 1,160.46

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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.