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Finding the Fourth Proportional to 388,344.48, 535,639.30 and 259,217.84

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Solution

The fourth proportional to 388,344.48, 535,639.30 and 259,217.84 is: 357,536.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,344.48 : 535,639.30 = 259,217.84 : x
  2. Step 2: Convert to fraction form
    388,344.48/535,639.30 = 259,217.84/x
  3. Step 3: Cross multiply
    388,344.48x = 535,639.30 × 259,217.84
  4. Step 4: Simplify right side
    388,344.48x = 138,847,262,365.11
  5. Step 5: Solve for x
    x = 138,847,262,365.11/388,344.48
  6. Step 6: Final answer
    x = 357,536.34

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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.