Home / 1,547.21-2,134.78-875.03

Finding the Fourth Proportional to 1,547.21, 2,134.78 and 875.03

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Solution

The fourth proportional to 1,547.21, 2,134.78 and 875.03 is: 1,207.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,547.21 : 2,134.78 = 875.03 : x
  2. Step 2: Convert to fraction form
    1,547.21/2,134.78 = 875.03/x
  3. Step 3: Cross multiply
    1,547.21x = 2,134.78 × 875.03
  4. Step 4: Simplify right side
    1,547.21x = 1,867,994.97
  5. Step 5: Solve for x
    x = 1,867,994.97/1,547.21
  6. Step 6: Final answer
    x = 1,207.33

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.