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Finding the Fourth Proportional to 1,116.75, 1,541.25 and 651

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Solution

The fourth proportional to 1,116.75, 1,541.25 and 651 is: 898.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,116.75 : 1,541.25 = 651 : x
  2. Step 2: Convert to fraction form
    1,116.75/1,541.25 = 651/x
  3. Step 3: Cross multiply
    1,116.75x = 1,541.25 × 651
  4. Step 4: Simplify right side
    1,116.75x = 1,003,353.75
  5. Step 5: Solve for x
    x = 1,003,353.75/1,116.75
  6. Step 6: Final answer
    x = 898.46

Related Problems

Find fourth proportional to 558.38, 770.63 and 325.50
Half scale
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Double scale
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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.