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Finding the Fourth Proportional to 387,407.30, 534,727.64 and 251,433.34

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Solution

The fourth proportional to 387,407.30, 534,727.64 and 251,433.34 is: 347,046.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,407.30 : 534,727.64 = 251,433.34 : x
  2. Step 2: Convert to fraction form
    387,407.30/534,727.64 = 251,433.34/x
  3. Step 3: Cross multiply
    387,407.30x = 534,727.64 × 251,433.34
  4. Step 4: Simplify right side
    387,407.30x = 134,448,355,807.28
  5. Step 5: Solve for x
    x = 134,448,355,807.28/387,407.30
  6. Step 6: Final answer
    x = 347,046.53

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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.