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Finding the Fourth Proportional to 387,674, 581,511 and 103,365.52

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Solution

The fourth proportional to 387,674, 581,511 and 103,365.52 is: 155,048.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,674 : 581,511 = 103,365.52 : x
  2. Step 2: Convert to fraction form
    387,674/581,511 = 103,365.52/x
  3. Step 3: Cross multiply
    387,674x = 581,511 × 103,365.52
  4. Step 4: Simplify right side
    387,674x = 60,108,186,900.72
  5. Step 5: Solve for x
    x = 60,108,186,900.72/387,674
  6. Step 6: Final answer
    x = 155,048.28

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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.