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Finding the Fourth Proportional to 877.89, 1,315.59 and 526.65

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Solution

The fourth proportional to 877.89, 1,315.59 and 526.65 is: 789.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    877.89 : 1,315.59 = 526.65 : x
  2. Step 2: Convert to fraction form
    877.89/1,315.59 = 526.65/x
  3. Step 3: Cross multiply
    877.89x = 1,315.59 × 526.65
  4. Step 4: Simplify right side
    877.89x = 692,855.47
  5. Step 5: Solve for x
    x = 692,855.47/877.89
  6. Step 6: Final answer
    x = 789.23

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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.