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Finding the Fourth Proportional to 783.18, 1,080.80 and 433.88

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Solution

The fourth proportional to 783.18, 1,080.80 and 433.88 is: 598.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    783.18 : 1,080.80 = 433.88 : x
  2. Step 2: Convert to fraction form
    783.18/1,080.80 = 433.88/x
  3. Step 3: Cross multiply
    783.18x = 1,080.80 × 433.88
  4. Step 4: Simplify right side
    783.18x = 468,937.50
  5. Step 5: Solve for x
    x = 468,937.50/783.18
  6. Step 6: Final answer
    x = 598.76

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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.