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Finding the Fourth Proportional to 880.76, 1,213.44 and 705.80

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Solution

The fourth proportional to 880.76, 1,213.44 and 705.80 is: 972.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    880.76 : 1,213.44 = 705.80 : x
  2. Step 2: Convert to fraction form
    880.76/1,213.44 = 705.80/x
  3. Step 3: Cross multiply
    880.76x = 1,213.44 × 705.80
  4. Step 4: Simplify right side
    880.76x = 856,445.95
  5. Step 5: Solve for x
    x = 856,445.95/880.76
  6. Step 6: Final answer
    x = 972.39

Related Problems

Find fourth proportional to 440.38, 606.72 and 352.90
Half scale
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Double scale
Find fourth proportional to 881.76, 1,214.82 and 706.80
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.