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Finding the Fourth Proportional to 4,877.70, 7,316.55 and 2,928.90

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Solution

The fourth proportional to 4,877.70, 7,316.55 and 2,928.90 is: 4,393.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,877.70 : 7,316.55 = 2,928.90 : x
  2. Step 2: Convert to fraction form
    4,877.70/7,316.55 = 2,928.90/x
  3. Step 3: Cross multiply
    4,877.70x = 7,316.55 × 2,928.90
  4. Step 4: Simplify right side
    4,877.70x = 21,429,443.30
  5. Step 5: Solve for x
    x = 21,429,443.30/4,877.70
  6. Step 6: Final answer
    x = 4,393.35

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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.