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Finding the Fourth Proportional to 553,665.60, 830,455.20 and 216,640.80

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Solution

The fourth proportional to 553,665.60, 830,455.20 and 216,640.80 is: 324,944.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,665.60 : 830,455.20 = 216,640.80 : x
  2. Step 2: Convert to fraction form
    553,665.60/830,455.20 = 216,640.80/x
  3. Step 3: Cross multiply
    553,665.60x = 830,455.20 × 216,640.80
  4. Step 4: Simplify right side
    553,665.60x = 179,910,478,892.16
  5. Step 5: Solve for x
    x = 179,910,478,892.16/553,665.60
  6. Step 6: Final answer
    x = 324,944.30

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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.