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Finding the Fourth Proportional to 498,087.78, 687,357.88 and 283,227.86

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Solution

The fourth proportional to 498,087.78, 687,357.88 and 283,227.86 is: 390,852.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    498,087.78 : 687,357.88 = 283,227.86 : x
  2. Step 2: Convert to fraction form
    498,087.78/687,357.88 = 283,227.86/x
  3. Step 3: Cross multiply
    498,087.78x = 687,357.88 × 283,227.86
  4. Step 4: Simplify right side
    498,087.78x = 194,678,901,406.54
  5. Step 5: Solve for x
    x = 194,678,901,406.54/498,087.78
  6. Step 6: Final answer
    x = 390,852.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.