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Finding the Fourth Proportional to 387,778.78, 581,675.46 and 121,533.40

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Solution

The fourth proportional to 387,778.78, 581,675.46 and 121,533.40 is: 182,302.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,778.78 : 581,675.46 = 121,533.40 : x
  2. Step 2: Convert to fraction form
    387,778.78/581,675.46 = 121,533.40/x
  3. Step 3: Cross multiply
    387,778.78x = 581,675.46 × 121,533.40
  4. Step 4: Simplify right side
    387,778.78x = 70,692,996,350.36
  5. Step 5: Solve for x
    x = 70,692,996,350.36/387,778.78
  6. Step 6: Final answer
    x = 182,302.38

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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.