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Finding the Fourth Proportional to 5,215.59, 7,779.85 and 4,723.11

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Solution

The fourth proportional to 5,215.59, 7,779.85 and 4,723.11 is: 7,045.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,215.59 : 7,779.85 = 4,723.11 : x
  2. Step 2: Convert to fraction form
    5,215.59/7,779.85 = 4,723.11/x
  3. Step 3: Cross multiply
    5,215.59x = 7,779.85 × 4,723.11
  4. Step 4: Simplify right side
    5,215.59x = 36,745,075.53
  5. Step 5: Solve for x
    x = 36,745,075.53/5,215.59
  6. Step 6: Final answer
    x = 7,045.24

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.