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Finding the Fourth Proportional to 898.77, 1,240.32 and 549.25

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Solution

The fourth proportional to 898.77, 1,240.32 and 549.25 is: 757.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    898.77 : 1,240.32 = 549.25 : x
  2. Step 2: Convert to fraction form
    898.77/1,240.32 = 549.25/x
  3. Step 3: Cross multiply
    898.77x = 1,240.32 × 549.25
  4. Step 4: Simplify right side
    898.77x = 681,245.76
  5. Step 5: Solve for x
    x = 681,245.76/898.77
  6. Step 6: Final answer
    x = 757.98

Related Problems

Find fourth proportional to 449.38, 620.16 and 274.63
Half scale
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Double scale
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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.