Home / 1,317.51-1,818.26-875.12

Finding the Fourth Proportional to 1,317.51, 1,818.26 and 875.12

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Solution

The fourth proportional to 1,317.51, 1,818.26 and 875.12 is: 1,207.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,317.51 : 1,818.26 = 875.12 : x
  2. Step 2: Convert to fraction form
    1,317.51/1,818.26 = 875.12/x
  3. Step 3: Cross multiply
    1,317.51x = 1,818.26 × 875.12
  4. Step 4: Simplify right side
    1,317.51x = 1,591,186.77
  5. Step 5: Solve for x
    x = 1,591,186.77/1,317.51
  6. Step 6: Final answer
    x = 1,207.72

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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.