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Finding the Fourth Proportional to 228,673.45, 315,468.84 and 137,978.83

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Solution

The fourth proportional to 228,673.45, 315,468.84 and 137,978.83 is: 190,350.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,673.45 : 315,468.84 = 137,978.83 : x
  2. Step 2: Convert to fraction form
    228,673.45/315,468.84 = 137,978.83/x
  3. Step 3: Cross multiply
    228,673.45x = 315,468.84 × 137,978.83
  4. Step 4: Simplify right side
    228,673.45x = 43,528,021,444.66
  5. Step 5: Solve for x
    x = 43,528,021,444.66/228,673.45
  6. Step 6: Final answer
    x = 190,350.13

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.