Home / 1,547.12-2,318.28-1,221.68

Finding the Fourth Proportional to 1,547.12, 2,318.28 and 1,221.68

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Solution

The fourth proportional to 1,547.12, 2,318.28 and 1,221.68 is: 1,830.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,547.12 : 2,318.28 = 1,221.68 : x
  2. Step 2: Convert to fraction form
    1,547.12/2,318.28 = 1,221.68/x
  3. Step 3: Cross multiply
    1,547.12x = 2,318.28 × 1,221.68
  4. Step 4: Simplify right side
    1,547.12x = 2,832,196.31
  5. Step 5: Solve for x
    x = 2,832,196.31/1,547.12
  6. Step 6: Final answer
    x = 1,830.62

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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.