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Finding the Fourth Proportional to 886.02, 1,317.08 and 859.77

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Solution

The fourth proportional to 886.02, 1,317.08 and 859.77 is: 1,278.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    886.02 : 1,317.08 = 859.77 : x
  2. Step 2: Convert to fraction form
    886.02/1,317.08 = 859.77/x
  3. Step 3: Cross multiply
    886.02x = 1,317.08 × 859.77
  4. Step 4: Simplify right side
    886.02x = 1,132,381.57
  5. Step 5: Solve for x
    x = 1,132,381.57/886.02
  6. Step 6: Final answer
    x = 1,278.05

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.