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Finding the Fourth Proportional to 560.80, 773.88 and 312.16

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Solution

The fourth proportional to 560.80, 773.88 and 312.16 is: 430.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    560.80 : 773.88 = 312.16 : x
  2. Step 2: Convert to fraction form
    560.80/773.88 = 312.16/x
  3. Step 3: Cross multiply
    560.80x = 773.88 × 312.16
  4. Step 4: Simplify right side
    560.80x = 241,574.38
  5. Step 5: Solve for x
    x = 241,574.38/560.80
  6. Step 6: Final answer
    x = 430.77

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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.