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Finding the Fourth Proportional to 289,485.76, 399,488.16 and 162,162.40

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Solution

The fourth proportional to 289,485.76, 399,488.16 and 162,162.40 is: 223,782.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,485.76 : 399,488.16 = 162,162.40 : x
  2. Step 2: Convert to fraction form
    289,485.76/399,488.16 = 162,162.40/x
  3. Step 3: Cross multiply
    289,485.76x = 399,488.16 × 162,162.40
  4. Step 4: Simplify right side
    289,485.76x = 64,781,958,797.18
  5. Step 5: Solve for x
    x = 64,781,958,797.18/289,485.76
  6. Step 6: Final answer
    x = 223,782.89

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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.