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Finding the Fourth Proportional to 877.86, 1,316.70 and 292.83

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Solution

The fourth proportional to 877.86, 1,316.70 and 292.83 is: 439.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    877.86 : 1,316.70 = 292.83 : x
  2. Step 2: Convert to fraction form
    877.86/1,316.70 = 292.83/x
  3. Step 3: Cross multiply
    877.86x = 1,316.70 × 292.83
  4. Step 4: Simplify right side
    877.86x = 385,569.26
  5. Step 5: Solve for x
    x = 385,569.26/877.86
  6. Step 6: Final answer
    x = 439.21

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1.5x scale

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.