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Finding the Fourth Proportional to 857.19, 1,182.87 and 525.66

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Solution

The fourth proportional to 857.19, 1,182.87 and 525.66 is: 725.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    857.19 : 1,182.87 = 525.66 : x
  2. Step 2: Convert to fraction form
    857.19/1,182.87 = 525.66/x
  3. Step 3: Cross multiply
    857.19x = 1,182.87 × 525.66
  4. Step 4: Simplify right side
    857.19x = 621,787.44
  5. Step 5: Solve for x
    x = 621,787.44/857.19
  6. Step 6: Final answer
    x = 725.38

Related Problems

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Half scale
Find fourth proportional to 1,714.38, 2,365.74 and 1,051.32
Double scale
Find fourth proportional to 858.19, 1,184.25 and 526.66
Similar ratio
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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.