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Finding the Fourth Proportional to 802.60, 1,205.10 and 560.20

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Solution

The fourth proportional to 802.60, 1,205.10 and 560.20 is: 841.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    802.60 : 1,205.10 = 560.20 : x
  2. Step 2: Convert to fraction form
    802.60/1,205.10 = 560.20/x
  3. Step 3: Cross multiply
    802.60x = 1,205.10 × 560.20
  4. Step 4: Simplify right side
    802.60x = 675,097.02
  5. Step 5: Solve for x
    x = 675,097.02/802.60
  6. Step 6: Final answer
    x = 841.14

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.