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Finding the Fourth Proportional to 763.92, 1,054.08 and 465.36

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Solution

The fourth proportional to 763.92, 1,054.08 and 465.36 is: 642.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    763.92 : 1,054.08 = 465.36 : x
  2. Step 2: Convert to fraction form
    763.92/1,054.08 = 465.36/x
  3. Step 3: Cross multiply
    763.92x = 1,054.08 × 465.36
  4. Step 4: Simplify right side
    763.92x = 490,526.67
  5. Step 5: Solve for x
    x = 490,526.67/763.92
  6. Step 6: Final answer
    x = 642.12

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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.