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Finding the Fourth Proportional to 647.85, 970.85 and 374.01

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Solution

The fourth proportional to 647.85, 970.85 and 374.01 is: 560.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    647.85 : 970.85 = 374.01 : x
  2. Step 2: Convert to fraction form
    647.85/970.85 = 374.01/x
  3. Step 3: Cross multiply
    647.85x = 970.85 × 374.01
  4. Step 4: Simplify right side
    647.85x = 363,105.74
  5. Step 5: Solve for x
    x = 363,105.74/647.85
  6. Step 6: Final answer
    x = 560.48

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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.