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Finding the Fourth Proportional to 783.04, 1,080.10 and 503.64

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Solution

The fourth proportional to 783.04, 1,080.10 and 503.64 is: 694.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    783.04 : 1,080.10 = 503.64 : x
  2. Step 2: Convert to fraction form
    783.04/1,080.10 = 503.64/x
  3. Step 3: Cross multiply
    783.04x = 1,080.10 × 503.64
  4. Step 4: Simplify right side
    783.04x = 543,976.16
  5. Step 5: Solve for x
    x = 543,976.16/783.04
  6. Step 6: Final answer
    x = 694.70

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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.