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Finding the Fourth Proportional to 318,460.95, 439,672.47 and 219,176.64

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Solution

The fourth proportional to 318,460.95, 439,672.47 and 219,176.64 is: 302,598.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,460.95 : 439,672.47 = 219,176.64 : x
  2. Step 2: Convert to fraction form
    318,460.95/439,672.47 = 219,176.64/x
  3. Step 3: Cross multiply
    318,460.95x = 439,672.47 × 219,176.64
  4. Step 4: Simplify right side
    318,460.95x = 96,365,934,675.10
  5. Step 5: Solve for x
    x = 96,365,934,675.10/318,460.95
  6. Step 6: Final answer
    x = 302,598.90

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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.