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Finding the Fourth Proportional to 374.40, 561.06 and 278.10

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Solution

The fourth proportional to 374.40, 561.06 and 278.10 is: 416.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    374.40 : 561.06 = 278.10 : x
  2. Step 2: Convert to fraction form
    374.40/561.06 = 278.10/x
  3. Step 3: Cross multiply
    374.40x = 561.06 × 278.10
  4. Step 4: Simplify right side
    374.40x = 156,030.79
  5. Step 5: Solve for x
    x = 156,030.79/374.40
  6. Step 6: Final answer
    x = 416.75

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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.