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Finding the Fourth Proportional to 900.41, 1,243.16 and 581.55

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Solution

The fourth proportional to 900.41, 1,243.16 and 581.55 is: 802.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    900.41 : 1,243.16 = 581.55 : x
  2. Step 2: Convert to fraction form
    900.41/1,243.16 = 581.55/x
  3. Step 3: Cross multiply
    900.41x = 1,243.16 × 581.55
  4. Step 4: Simplify right side
    900.41x = 722,956.79
  5. Step 5: Solve for x
    x = 722,956.79/900.41
  6. Step 6: Final answer
    x = 802.92

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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.