Home / 1,421.41-2,130.17-726.62

Finding the Fourth Proportional to 1,421.41, 2,130.17 and 726.62

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Solution

The fourth proportional to 1,421.41, 2,130.17 and 726.62 is: 1,088.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,421.41 : 2,130.17 = 726.62 : x
  2. Step 2: Convert to fraction form
    1,421.41/2,130.17 = 726.62/x
  3. Step 3: Cross multiply
    1,421.41x = 2,130.17 × 726.62
  4. Step 4: Simplify right side
    1,421.41x = 1,547,824.13
  5. Step 5: Solve for x
    x = 1,547,824.13/1,421.41
  6. Step 6: Final answer
    x = 1,088.94

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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.