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Finding the Fourth Proportional to 745.04, 1,116.12 and 421.04

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Solution

The fourth proportional to 745.04, 1,116.12 and 421.04 is: 630.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    745.04 : 1,116.12 = 421.04 : x
  2. Step 2: Convert to fraction form
    745.04/1,116.12 = 421.04/x
  3. Step 3: Cross multiply
    745.04x = 1,116.12 × 421.04
  4. Step 4: Simplify right side
    745.04x = 469,931.16
  5. Step 5: Solve for x
    x = 469,931.16/745.04
  6. Step 6: Final answer
    x = 630.75

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1.5x scale

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.