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Finding the Fourth Proportional to 351,967.23, 485,678.40 and 216,006.90

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Solution

The fourth proportional to 351,967.23, 485,678.40 and 216,006.90 is: 298,067.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    351,967.23 : 485,678.40 = 216,006.90 : x
  2. Step 2: Convert to fraction form
    351,967.23/485,678.40 = 216,006.90/x
  3. Step 3: Cross multiply
    351,967.23x = 485,678.40 × 216,006.90
  4. Step 4: Simplify right side
    351,967.23x = 104,909,885,580.96
  5. Step 5: Solve for x
    x = 104,909,885,580.96/351,967.23
  6. Step 6: Final answer
    x = 298,067.20

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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.