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Finding the Fourth Proportional to 280,064.70, 386,473.89 and 159,189.18

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Solution

The fourth proportional to 280,064.70, 386,473.89 and 159,189.18 is: 219,672.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,064.70 : 386,473.89 = 159,189.18 : x
  2. Step 2: Convert to fraction form
    280,064.70/386,473.89 = 159,189.18/x
  3. Step 3: Cross multiply
    280,064.70x = 386,473.89 × 159,189.18
  4. Step 4: Simplify right side
    280,064.70x = 61,522,461,640.51
  5. Step 5: Solve for x
    x = 61,522,461,640.51/280,064.70
  6. Step 6: Final answer
    x = 219,672.32

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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.