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Finding the Fourth Proportional to 289,441.92, 399,437.64 and 162,114.72

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Solution

The fourth proportional to 289,441.92, 399,437.64 and 162,114.72 is: 223,722.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,441.92 : 399,437.64 = 162,114.72 : x
  2. Step 2: Convert to fraction form
    289,441.92/399,437.64 = 162,114.72/x
  3. Step 3: Cross multiply
    289,441.92x = 399,437.64 × 162,114.72
  4. Step 4: Simplify right side
    289,441.92x = 64,754,721,166.06
  5. Step 5: Solve for x
    x = 64,754,721,166.06/289,441.92
  6. Step 6: Final answer
    x = 223,722.68

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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.