Home / 1,687.40-2,328.90-1,058.46

Finding the Fourth Proportional to 1,687.40, 2,328.90 and 1,058.46

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Solution

The fourth proportional to 1,687.40, 2,328.90 and 1,058.46 is: 1,460.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,687.40 : 2,328.90 = 1,058.46 : x
  2. Step 2: Convert to fraction form
    1,687.40/2,328.90 = 1,058.46/x
  3. Step 3: Cross multiply
    1,687.40x = 2,328.90 × 1,058.46
  4. Step 4: Simplify right side
    1,687.40x = 2,465,047.49
  5. Step 5: Solve for x
    x = 2,465,047.49/1,687.40
  6. Step 6: Final answer
    x = 1,460.86

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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.