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Finding the Fourth Proportional to 388,101.24, 535,402.71 and 280,500.84

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Solution

The fourth proportional to 388,101.24, 535,402.71 and 280,500.84 is: 386,963.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,101.24 : 535,402.71 = 280,500.84 : x
  2. Step 2: Convert to fraction form
    388,101.24/535,402.71 = 280,500.84/x
  3. Step 3: Cross multiply
    388,101.24x = 535,402.71 × 280,500.84
  4. Step 4: Simplify right side
    388,101.24x = 150,180,909,893.28
  5. Step 5: Solve for x
    x = 150,180,909,893.28/388,101.24
  6. Step 6: Final answer
    x = 386,963.23

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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.