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Finding the Fourth Proportional to 1,150.76, 1,587.12 and 818.94

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Solution

The fourth proportional to 1,150.76, 1,587.12 and 818.94 is: 1,129.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,150.76 : 1,587.12 = 818.94 : x
  2. Step 2: Convert to fraction form
    1,150.76/1,587.12 = 818.94/x
  3. Step 3: Cross multiply
    1,150.76x = 1,587.12 × 818.94
  4. Step 4: Simplify right side
    1,150.76x = 1,299,756.05
  5. Step 5: Solve for x
    x = 1,299,756.05/1,150.76
  6. Step 6: Final answer
    x = 1,129.48

Related Problems

Find fourth proportional to 575.38, 793.56 and 409.47
Half scale
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Double scale
Find fourth proportional to 1,151.76, 1,588.50 and 819.94
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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.