Home / 459,455.40-689,258.70-143,836.20

Finding the Fourth Proportional to 459,455.40, 689,258.70 and 143,836.20

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Solution

The fourth proportional to 459,455.40, 689,258.70 and 143,836.20 is: 215,777.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    459,455.40 : 689,258.70 = 143,836.20 : x
  2. Step 2: Convert to fraction form
    459,455.40/689,258.70 = 143,836.20/x
  3. Step 3: Cross multiply
    459,455.40x = 689,258.70 × 143,836.20
  4. Step 4: Simplify right side
    459,455.40x = 99,140,352,224.94
  5. Step 5: Solve for x
    x = 99,140,352,224.94/459,455.40
  6. Step 6: Final answer
    x = 215,777.97

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.