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Finding the Fourth Proportional to 783.40, 1,080.84 and 468.76

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Solution

The fourth proportional to 783.40, 1,080.84 and 468.76 is: 646.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    783.40 : 1,080.84 = 468.76 : x
  2. Step 2: Convert to fraction form
    783.40/1,080.84 = 468.76/x
  3. Step 3: Cross multiply
    783.40x = 1,080.84 × 468.76
  4. Step 4: Simplify right side
    783.40x = 506,654.56
  5. Step 5: Solve for x
    x = 506,654.56/783.40
  6. Step 6: Final answer
    x = 646.74

Related Problems

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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.