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Finding the Fourth Proportional to 912.28, 1,259.12 and 581.08

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Solution

The fourth proportional to 912.28, 1,259.12 and 581.08 is: 802.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    912.28 : 1,259.12 = 581.08 : x
  2. Step 2: Convert to fraction form
    912.28/1,259.12 = 581.08/x
  3. Step 3: Cross multiply
    912.28x = 1,259.12 × 581.08
  4. Step 4: Simplify right side
    912.28x = 731,649.45
  5. Step 5: Solve for x
    x = 731,649.45/912.28
  6. Step 6: Final answer
    x = 802.00

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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.