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Finding the Fourth Proportional to 560.92, 774.08 and 312.26

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Solution

The fourth proportional to 560.92, 774.08 and 312.26 is: 430.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    560.92 : 774.08 = 312.26 : x
  2. Step 2: Convert to fraction form
    560.92/774.08 = 312.26/x
  3. Step 3: Cross multiply
    560.92x = 774.08 × 312.26
  4. Step 4: Simplify right side
    560.92x = 241,715.77
  5. Step 5: Solve for x
    x = 241,715.77/560.92
  6. Step 6: Final answer
    x = 430.93

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Find fourth proportional to 280.46, 387.04 and 156.13
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Double scale
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Similar ratio
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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.