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Finding the Fourth Proportional to 553,035.60, 763,180.62 and 311,317.41

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Solution

The fourth proportional to 553,035.60, 763,180.62 and 311,317.41 is: 429,613.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,035.60 : 763,180.62 = 311,317.41 : x
  2. Step 2: Convert to fraction form
    553,035.60/763,180.62 = 311,317.41/x
  3. Step 3: Cross multiply
    553,035.60x = 763,180.62 × 311,317.41
  4. Step 4: Simplify right side
    553,035.60x = 237,591,413,980.59
  5. Step 5: Solve for x
    x = 237,591,413,980.59/553,035.60
  6. Step 6: Final answer
    x = 429,613.24

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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.