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Finding the Fourth Proportional to 515,474.59, 711,320.74 and 286,017.33

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Solution

The fourth proportional to 515,474.59, 711,320.74 and 286,017.33 is: 394,684.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,474.59 : 711,320.74 = 286,017.33 : x
  2. Step 2: Convert to fraction form
    515,474.59/711,320.74 = 286,017.33/x
  3. Step 3: Cross multiply
    515,474.59x = 711,320.74 × 286,017.33
  4. Step 4: Simplify right side
    515,474.59x = 203,450,058,828.42
  5. Step 5: Solve for x
    x = 203,450,058,828.42/515,474.59
  6. Step 6: Final answer
    x = 394,684.94

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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.