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Finding the Fourth Proportional to 900.44, 1,242.56 and 507.40

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Solution

The fourth proportional to 900.44, 1,242.56 and 507.40 is: 700.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    900.44 : 1,242.56 = 507.40 : x
  2. Step 2: Convert to fraction form
    900.44/1,242.56 = 507.40/x
  3. Step 3: Cross multiply
    900.44x = 1,242.56 × 507.40
  4. Step 4: Simplify right side
    900.44x = 630,474.94
  5. Step 5: Solve for x
    x = 630,474.94/900.44
  6. Step 6: Final answer
    x = 700.19

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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.