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Finding the Fourth Proportional to 387,973.63, 535,227.69 and 280,373.23

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Solution

The fourth proportional to 387,973.63, 535,227.69 and 280,373.23 is: 386,787.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,973.63 : 535,227.69 = 280,373.23 : x
  2. Step 2: Convert to fraction form
    387,973.63/535,227.69 = 280,373.23/x
  3. Step 3: Cross multiply
    387,973.63x = 535,227.69 × 280,373.23
  4. Step 4: Simplify right side
    387,973.63x = 150,063,516,230.74
  5. Step 5: Solve for x
    x = 150,063,516,230.74/387,973.63
  6. Step 6: Final answer
    x = 386,787.93

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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.