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Finding the Fourth Proportional to 318,483.78, 439,360.65 and 205,342.98

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Solution

The fourth proportional to 318,483.78, 439,360.65 and 205,342.98 is: 283,278.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,483.78 : 439,360.65 = 205,342.98 : x
  2. Step 2: Convert to fraction form
    318,483.78/439,360.65 = 205,342.98/x
  3. Step 3: Cross multiply
    318,483.78x = 439,360.65 × 205,342.98
  4. Step 4: Simplify right side
    318,483.78x = 90,219,625,165.74
  5. Step 5: Solve for x
    x = 90,219,625,165.74/318,483.78
  6. Step 6: Final answer
    x = 283,278.56

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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.