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Finding the Fourth Proportional to 515,474.49, 711,320.62 and 286,017.23

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Solution

The fourth proportional to 515,474.49, 711,320.62 and 286,017.23 is: 394,684.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,474.49 : 711,320.62 = 286,017.23 : x
  2. Step 2: Convert to fraction form
    515,474.49/711,320.62 = 286,017.23/x
  3. Step 3: Cross multiply
    515,474.49x = 711,320.62 × 286,017.23
  4. Step 4: Simplify right side
    515,474.49x = 203,449,953,374.28
  5. Step 5: Solve for x
    x = 203,449,953,374.28/515,474.49
  6. Step 6: Final answer
    x = 394,684.81

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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.