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Finding the Fourth Proportional to 875.00, 1,312.10 and 381.38

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Solution

The fourth proportional to 875.00, 1,312.10 and 381.38 is: 571.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    875.00 : 1,312.10 = 381.38 : x
  2. Step 2: Convert to fraction form
    875.00/1,312.10 = 381.38/x
  3. Step 3: Cross multiply
    875.00x = 1,312.10 × 381.38
  4. Step 4: Simplify right side
    875.00x = 500,413.25
  5. Step 5: Solve for x
    x = 500,413.25/875.00
  6. Step 6: Final answer
    x = 571.90

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.