Home / 1,417.48-2,126.62-687.08

Finding the Fourth Proportional to 1,417.48, 2,126.62 and 687.08

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Solution

The fourth proportional to 1,417.48, 2,126.62 and 687.08 is: 1,030.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,417.48 : 2,126.62 = 687.08 : x
  2. Step 2: Convert to fraction form
    1,417.48/2,126.62 = 687.08/x
  3. Step 3: Cross multiply
    1,417.48x = 2,126.62 × 687.08
  4. Step 4: Simplify right side
    1,417.48x = 1,461,158.07
  5. Step 5: Solve for x
    x = 1,461,158.07/1,417.48
  6. Step 6: Final answer
    x = 1,030.81

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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.