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Finding the Fourth Proportional to 615,822.80, 922,859.40 and 428,615.60

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Solution

The fourth proportional to 615,822.80, 922,859.40 and 428,615.60 is: 642,314.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,822.80 : 922,859.40 = 428,615.60 : x
  2. Step 2: Convert to fraction form
    615,822.80/922,859.40 = 428,615.60/x
  3. Step 3: Cross multiply
    615,822.80x = 922,859.40 × 428,615.60
  4. Step 4: Simplify right side
    615,822.80x = 395,551,935,446.64
  5. Step 5: Solve for x
    x = 395,551,935,446.64/615,822.80
  6. Step 6: Final answer
    x = 642,314.54

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1.5x scale

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.