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Finding the Fourth Proportional to 500,875.52, 691,036.80 and 285,860.48

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Solution

The fourth proportional to 500,875.52, 691,036.80 and 285,860.48 is: 394,389.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    500,875.52 : 691,036.80 = 285,860.48 : x
  2. Step 2: Convert to fraction form
    500,875.52/691,036.80 = 285,860.48/x
  3. Step 3: Cross multiply
    500,875.52x = 691,036.80 × 285,860.48
  4. Step 4: Simplify right side
    500,875.52x = 197,540,111,345.66
  5. Step 5: Solve for x
    x = 197,540,111,345.66/500,875.52
  6. Step 6: Final answer
    x = 394,389.63

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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.