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Finding the Fourth Proportional to 784.76, 1,082.79 and 453.08

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Solution

The fourth proportional to 784.76, 1,082.79 and 453.08 is: 625.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    784.76 : 1,082.79 = 453.08 : x
  2. Step 2: Convert to fraction form
    784.76/1,082.79 = 453.08/x
  3. Step 3: Cross multiply
    784.76x = 1,082.79 × 453.08
  4. Step 4: Simplify right side
    784.76x = 490,590.49
  5. Step 5: Solve for x
    x = 490,590.49/784.76
  6. Step 6: Final answer
    x = 625.15

Related Problems

Find fourth proportional to 392.38, 541.40 and 226.54
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.