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Finding the Fourth Proportional to 528,001.92, 791,994.78 and 128,643.48

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Solution

The fourth proportional to 528,001.92, 791,994.78 and 128,643.48 is: 192,963.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,001.92 : 791,994.78 = 128,643.48 : x
  2. Step 2: Convert to fraction form
    528,001.92/791,994.78 = 128,643.48/x
  3. Step 3: Cross multiply
    528,001.92x = 791,994.78 × 128,643.48
  4. Step 4: Simplify right side
    528,001.92x = 101,884,964,641.03
  5. Step 5: Solve for x
    x = 101,884,964,641.03/528,001.92
  6. Step 6: Final answer
    x = 192,963.25

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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.