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Finding the Fourth Proportional to 318,008.36, 438,878.46 and 216,259.52

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Solution

The fourth proportional to 318,008.36, 438,878.46 and 216,259.52 is: 298,456.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,008.36 : 438,878.46 = 216,259.52 : x
  2. Step 2: Convert to fraction form
    318,008.36/438,878.46 = 216,259.52/x
  3. Step 3: Cross multiply
    318,008.36x = 438,878.46 × 216,259.52
  4. Step 4: Simplify right side
    318,008.36x = 94,911,645,097.94
  5. Step 5: Solve for x
    x = 94,911,645,097.94/318,008.36
  6. Step 6: Final answer
    x = 298,456.45

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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.