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Finding the Fourth Proportional to 456,015.60, 639,471.60 and 456,015.60

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Solution

The fourth proportional to 456,015.60, 639,471.60 and 456,015.60 is: 639,471.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    456,015.60 : 639,471.60 = 456,015.60 : x
  2. Step 2: Convert to fraction form
    456,015.60/639,471.60 = 456,015.60/x
  3. Step 3: Cross multiply
    456,015.60x = 639,471.60 × 456,015.60
  4. Step 4: Simplify right side
    456,015.60x = 291,609,025,356.96
  5. Step 5: Solve for x
    x = 291,609,025,356.96/456,015.60
  6. Step 6: Final answer
    x = 639,471.60

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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.