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Finding the Fourth Proportional to 391,564, 540,312.48 and 230,383.60

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Solution

The fourth proportional to 391,564, 540,312.48 and 230,383.60 is: 317,902.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,564 : 540,312.48 = 230,383.60 : x
  2. Step 2: Convert to fraction form
    391,564/540,312.48 = 230,383.60/x
  3. Step 3: Cross multiply
    391,564x = 540,312.48 × 230,383.60
  4. Step 4: Simplify right side
    391,564x = 124,479,134,267.33
  5. Step 5: Solve for x
    x = 124,479,134,267.33/391,564
  6. Step 6: Final answer
    x = 317,902.40

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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.