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Finding the Fourth Proportional to 877.03, 1,315.68 and 291.84

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Solution

The fourth proportional to 877.03, 1,315.68 and 291.84 is: 437.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    877.03 : 1,315.68 = 291.84 : x
  2. Step 2: Convert to fraction form
    877.03/1,315.68 = 291.84/x
  3. Step 3: Cross multiply
    877.03x = 1,315.68 × 291.84
  4. Step 4: Simplify right side
    877.03x = 383,966.59
  5. Step 5: Solve for x
    x = 383,966.59/877.03
  6. Step 6: Final answer
    x = 437.80

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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.