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Finding the Fourth Proportional to 948.30, 1,421.10 and 370.50

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Solution

The fourth proportional to 948.30, 1,421.10 and 370.50 is: 555.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    948.30 : 1,421.10 = 370.50 : x
  2. Step 2: Convert to fraction form
    948.30/1,421.10 = 370.50/x
  3. Step 3: Cross multiply
    948.30x = 1,421.10 × 370.50
  4. Step 4: Simplify right side
    948.30x = 526,517.55
  5. Step 5: Solve for x
    x = 526,517.55/948.30
  6. Step 6: Final answer
    x = 555.22

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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.