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Finding the Fourth Proportional to 912.48, 1,259.64 and 581.44

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Solution

The fourth proportional to 912.48, 1,259.64 and 581.44 is: 802.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    912.48 : 1,259.64 = 581.44 : x
  2. Step 2: Convert to fraction form
    912.48/1,259.64 = 581.44/x
  3. Step 3: Cross multiply
    912.48x = 1,259.64 × 581.44
  4. Step 4: Simplify right side
    912.48x = 732,405.08
  5. Step 5: Solve for x
    x = 732,405.08/912.48
  6. Step 6: Final answer
    x = 802.65

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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.