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Finding the Fourth Proportional to 660,632.76, 990,943.66 and 392,618.34

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Solution

The fourth proportional to 660,632.76, 990,943.66 and 392,618.34 is: 588,924.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,632.76 : 990,943.66 = 392,618.34 : x
  2. Step 2: Convert to fraction form
    660,632.76/990,943.66 = 392,618.34/x
  3. Step 3: Cross multiply
    660,632.76x = 990,943.66 × 392,618.34
  4. Step 4: Simplify right side
    660,632.76x = 389,062,654,822.72
  5. Step 5: Solve for x
    x = 389,062,654,822.72/660,632.76
  6. Step 6: Final answer
    x = 588,924.25

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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.