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Finding the Fourth Proportional to 615,415.20, 864,069.60 and 615,415.20

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Solution

The fourth proportional to 615,415.20, 864,069.60 and 615,415.20 is: 864,069.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,415.20 : 864,069.60 = 615,415.20 : x
  2. Step 2: Convert to fraction form
    615,415.20/864,069.60 = 615,415.20/x
  3. Step 3: Cross multiply
    615,415.20x = 864,069.60 × 615,415.20
  4. Step 4: Simplify right side
    615,415.20x = 531,761,565,697.92
  5. Step 5: Solve for x
    x = 531,761,565,697.92/615,415.20
  6. Step 6: Final answer
    x = 864,069.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.