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Finding the Fourth Proportional to 515,426.10, 711,326.97 and 286,026.81

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Solution

The fourth proportional to 515,426.10, 711,326.97 and 286,026.81 is: 394,738.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,426.10 : 711,326.97 = 286,026.81 : x
  2. Step 2: Convert to fraction form
    515,426.10/711,326.97 = 286,026.81/x
  3. Step 3: Cross multiply
    515,426.10x = 711,326.97 × 286,026.81
  4. Step 4: Simplify right side
    515,426.10x = 203,458,584,096.07
  5. Step 5: Solve for x
    x = 203,458,584,096.07/515,426.10
  6. Step 6: Final answer
    x = 394,738.61

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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.