Home / 1,417.29-2,126.36-686.89

Finding the Fourth Proportional to 1,417.29, 2,126.36 and 686.89

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Solution

The fourth proportional to 1,417.29, 2,126.36 and 686.89 is: 1,030.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,417.29 : 2,126.36 = 686.89 : x
  2. Step 2: Convert to fraction form
    1,417.29/2,126.36 = 686.89/x
  3. Step 3: Cross multiply
    1,417.29x = 2,126.36 × 686.89
  4. Step 4: Simplify right side
    1,417.29x = 1,460,575.42
  5. Step 5: Solve for x
    x = 1,460,575.42/1,417.29
  6. Step 6: Final answer
    x = 1,030.54

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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.