Home / 1,547.08-2,320.78-521.16

Finding the Fourth Proportional to 1,547.08, 2,320.78 and 521.16

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Solution

The fourth proportional to 1,547.08, 2,320.78 and 521.16 is: 781.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,547.08 : 2,320.78 = 521.16 : x
  2. Step 2: Convert to fraction form
    1,547.08/2,320.78 = 521.16/x
  3. Step 3: Cross multiply
    1,547.08x = 2,320.78 × 521.16
  4. Step 4: Simplify right side
    1,547.08x = 1,209,497.70
  5. Step 5: Solve for x
    x = 1,209,497.70/1,547.08
  6. Step 6: Final answer
    x = 781.79

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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.