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Finding the Fourth Proportional to 311,688.01, 429,929.99 and 216,159.85

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Solution

The fourth proportional to 311,688.01, 429,929.99 and 216,159.85 is: 298,162.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,688.01 : 429,929.99 = 216,159.85 : x
  2. Step 2: Convert to fraction form
    311,688.01/429,929.99 = 216,159.85/x
  3. Step 3: Cross multiply
    311,688.01x = 429,929.99 × 216,159.85
  4. Step 4: Simplify right side
    311,688.01x = 92,933,599,999.25
  5. Step 5: Solve for x
    x = 92,933,599,999.25/311,688.01
  6. Step 6: Final answer
    x = 298,162.26

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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.