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Finding the Fourth Proportional to 388,189.72, 535,912.08 and 272,259.21

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Solution

The fourth proportional to 388,189.72, 535,912.08 and 272,259.21 is: 375,865.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,189.72 : 535,912.08 = 272,259.21 : x
  2. Step 2: Convert to fraction form
    388,189.72/535,912.08 = 272,259.21/x
  3. Step 3: Cross multiply
    388,189.72x = 535,912.08 × 272,259.21
  4. Step 4: Simplify right side
    388,189.72x = 145,906,999,530.26
  5. Step 5: Solve for x
    x = 145,906,999,530.26/388,189.72
  6. Step 6: Final answer
    x = 375,865.18

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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.