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Finding the Fourth Proportional to 900.10, 1,350.05 and 380.18

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Solution

The fourth proportional to 900.10, 1,350.05 and 380.18 is: 570.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    900.10 : 1,350.05 = 380.18 : x
  2. Step 2: Convert to fraction form
    900.10/1,350.05 = 380.18/x
  3. Step 3: Cross multiply
    900.10x = 1,350.05 × 380.18
  4. Step 4: Simplify right side
    900.10x = 513,264.43
  5. Step 5: Solve for x
    x = 513,264.43/900.10
  6. Step 6: Final answer
    x = 570.23

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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.