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Finding the Fourth Proportional to 762.65, 1,052.45 and 413.34

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Solution

The fourth proportional to 762.65, 1,052.45 and 413.34 is: 570.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    762.65 : 1,052.45 = 413.34 : x
  2. Step 2: Convert to fraction form
    762.65/1,052.45 = 413.34/x
  3. Step 3: Cross multiply
    762.65x = 1,052.45 × 413.34
  4. Step 4: Simplify right side
    762.65x = 435,017.54
  5. Step 5: Solve for x
    x = 435,017.54/762.65
  6. Step 6: Final answer
    x = 570.40

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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.