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Finding the Fourth Proportional to 560.80, 841.20 and 474.40

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Solution

The fourth proportional to 560.80, 841.20 and 474.40 is: 711.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    560.80 : 841.20 = 474.40 : x
  2. Step 2: Convert to fraction form
    560.80/841.20 = 474.40/x
  3. Step 3: Cross multiply
    560.80x = 841.20 × 474.40
  4. Step 4: Simplify right side
    560.80x = 399,065.28
  5. Step 5: Solve for x
    x = 399,065.28/560.80
  6. Step 6: Final answer
    x = 711.60

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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.