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Finding the Fourth Proportional to 948.10, 1,421.88 and 370.84

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Solution

The fourth proportional to 948.10, 1,421.88 and 370.84 is: 556.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    948.10 : 1,421.88 = 370.84 : x
  2. Step 2: Convert to fraction form
    948.10/1,421.88 = 370.84/x
  3. Step 3: Cross multiply
    948.10x = 1,421.88 × 370.84
  4. Step 4: Simplify right side
    948.10x = 527,289.98
  5. Step 5: Solve for x
    x = 527,289.98/948.10
  6. Step 6: Final answer
    x = 556.15

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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.