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Finding the Fourth Proportional to 478,359.60, 716,653.80 and 278,775.60

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Solution

The fourth proportional to 478,359.60, 716,653.80 and 278,775.60 is: 417,647.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,359.60 : 716,653.80 = 278,775.60 : x
  2. Step 2: Convert to fraction form
    478,359.60/716,653.80 = 278,775.60/x
  3. Step 3: Cross multiply
    478,359.60x = 716,653.80 × 278,775.60
  4. Step 4: Simplify right side
    478,359.60x = 199,785,593,087.28
  5. Step 5: Solve for x
    x = 199,785,593,087.28/478,359.60
  6. Step 6: Final answer
    x = 417,647.30

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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.