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Finding the Fourth Proportional to 898.76, 1,240.14 and 525.56

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Solution

The fourth proportional to 898.76, 1,240.14 and 525.56 is: 725.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    898.76 : 1,240.14 = 525.56 : x
  2. Step 2: Convert to fraction form
    898.76/1,240.14 = 525.56/x
  3. Step 3: Cross multiply
    898.76x = 1,240.14 × 525.56
  4. Step 4: Simplify right side
    898.76x = 651,767.98
  5. Step 5: Solve for x
    x = 651,767.98/898.76
  6. Step 6: Final answer
    x = 725.19

Related Problems

Find fourth proportional to 449.38, 620.07 and 262.78
Half scale
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Double scale
Find fourth proportional to 899.76, 1,241.52 and 526.56
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.