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Finding the Fourth Proportional to 410,005.20, 615,007.80 and 251,720.40

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Solution

The fourth proportional to 410,005.20, 615,007.80 and 251,720.40 is: 377,580.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    410,005.20 : 615,007.80 = 251,720.40 : x
  2. Step 2: Convert to fraction form
    410,005.20/615,007.80 = 251,720.40/x
  3. Step 3: Cross multiply
    410,005.20x = 615,007.80 × 251,720.40
  4. Step 4: Simplify right side
    410,005.20x = 154,810,009,419.12
  5. Step 5: Solve for x
    x = 154,810,009,419.12/410,005.20
  6. Step 6: Final answer
    x = 377,580.60

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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.