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Finding the Fourth Proportional to 900.51, 1,240.99 and 601.21

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Solution

The fourth proportional to 900.51, 1,240.99 and 601.21 is: 828.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    900.51 : 1,240.99 = 601.21 : x
  2. Step 2: Convert to fraction form
    900.51/1,240.99 = 601.21/x
  3. Step 3: Cross multiply
    900.51x = 1,240.99 × 601.21
  4. Step 4: Simplify right side
    900.51x = 746,095.60
  5. Step 5: Solve for x
    x = 746,095.60/900.51
  6. Step 6: Final answer
    x = 828.53

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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.