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Finding the Fourth Proportional to 315,739.20, 474,775.20 and 264,417.60

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Solution

The fourth proportional to 315,739.20, 474,775.20 and 264,417.60 is: 397,603.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,739.20 : 474,775.20 = 264,417.60 : x
  2. Step 2: Convert to fraction form
    315,739.20/474,775.20 = 264,417.60/x
  3. Step 3: Cross multiply
    315,739.20x = 474,775.20 × 264,417.60
  4. Step 4: Simplify right side
    315,739.20x = 125,538,918,923.52
  5. Step 5: Solve for x
    x = 125,538,918,923.52/315,739.20
  6. Step 6: Final answer
    x = 397,603.21

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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.