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Finding the Fourth Proportional to 318,031, 438,619.88 and 215,888.56

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Solution

The fourth proportional to 318,031, 438,619.88 and 215,888.56 is: 297,747.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,031 : 438,619.88 = 215,888.56 : x
  2. Step 2: Convert to fraction form
    318,031/438,619.88 = 215,888.56/x
  3. Step 3: Cross multiply
    318,031x = 438,619.88 × 215,888.56
  4. Step 4: Simplify right side
    318,031x = 94,693,014,280.57
  5. Step 5: Solve for x
    x = 94,693,014,280.57/318,031
  6. Step 6: Final answer
    x = 297,747.75

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.