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Finding the Fourth Proportional to 458,957.45, 688,466.55 and 121,993.40

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Solution

The fourth proportional to 458,957.45, 688,466.55 and 121,993.40 is: 182,998.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    458,957.45 : 688,466.55 = 121,993.40 : x
  2. Step 2: Convert to fraction form
    458,957.45/688,466.55 = 121,993.40/x
  3. Step 3: Cross multiply
    458,957.45x = 688,466.55 × 121,993.40
  4. Step 4: Simplify right side
    458,957.45x = 83,988,375,220.77
  5. Step 5: Solve for x
    x = 83,988,375,220.77/458,957.45
  6. Step 6: Final answer
    x = 182,998.17

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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.