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Finding the Fourth Proportional to 908.76, 1,254.10 and 494.76

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Solution

The fourth proportional to 908.76, 1,254.10 and 494.76 is: 682.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    908.76 : 1,254.10 = 494.76 : x
  2. Step 2: Convert to fraction form
    908.76/1,254.10 = 494.76/x
  3. Step 3: Cross multiply
    908.76x = 1,254.10 × 494.76
  4. Step 4: Simplify right side
    908.76x = 620,478.52
  5. Step 5: Solve for x
    x = 620,478.52/908.76
  6. Step 6: Final answer
    x = 682.77

Related Problems

Find fourth proportional to 454.38, 627.05 and 247.38
Half scale
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Double scale
Find fourth proportional to 909.76, 1,255.48 and 495.76
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.