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Finding the Fourth Proportional to 900.04, 1,241.74 and 690.28

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Solution

The fourth proportional to 900.04, 1,241.74 and 690.28 is: 952.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    900.04 : 1,241.74 = 690.28 : x
  2. Step 2: Convert to fraction form
    900.04/1,241.74 = 690.28/x
  3. Step 3: Cross multiply
    900.04x = 1,241.74 × 690.28
  4. Step 4: Simplify right side
    900.04x = 857,148.29
  5. Step 5: Solve for x
    x = 857,148.29/900.04
  6. Step 6: Final answer
    x = 952.34

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.