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Finding the Fourth Proportional to 387,503.84, 581,320.56 and 121,211.48

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Solution

The fourth proportional to 387,503.84, 581,320.56 and 121,211.48 is: 181,837.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,503.84 : 581,320.56 = 121,211.48 : x
  2. Step 2: Convert to fraction form
    387,503.84/581,320.56 = 121,211.48/x
  3. Step 3: Cross multiply
    387,503.84x = 581,320.56 × 121,211.48
  4. Step 4: Simplify right side
    387,503.84x = 70,462,725,432.03
  5. Step 5: Solve for x
    x = 70,462,725,432.03/387,503.84
  6. Step 6: Final answer
    x = 181,837.49

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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.