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Finding the Fourth Proportional to 560.96, 774.09 and 312.30

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Solution

The fourth proportional to 560.96, 774.09 and 312.30 is: 430.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    560.96 : 774.09 = 312.30 : x
  2. Step 2: Convert to fraction form
    560.96/774.09 = 312.30/x
  3. Step 3: Cross multiply
    560.96x = 774.09 × 312.30
  4. Step 4: Simplify right side
    560.96x = 241,748.31
  5. Step 5: Solve for x
    x = 241,748.31/560.96
  6. Step 6: Final answer
    x = 430.96

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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.