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Finding the Fourth Proportional to 410,415.20, 615,622.80 and 403,416.80

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Solution

The fourth proportional to 410,415.20, 615,622.80 and 403,416.80 is: 605,125.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    410,415.20 : 615,622.80 = 403,416.80 : x
  2. Step 2: Convert to fraction form
    410,415.20/615,622.80 = 403,416.80/x
  3. Step 3: Cross multiply
    410,415.20x = 615,622.80 × 403,416.80
  4. Step 4: Simplify right side
    410,415.20x = 248,352,579,983.04
  5. Step 5: Solve for x
    x = 248,352,579,983.04/410,415.20
  6. Step 6: Final answer
    x = 605,125.20

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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.