Home / 389,924.40-538,345.80-318,475.92

Finding the Fourth Proportional to 389,924.40, 538,345.80 and 318,475.92

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Solution

The fourth proportional to 389,924.40, 538,345.80 and 318,475.92 is: 439,701.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,924.40 : 538,345.80 = 318,475.92 : x
  2. Step 2: Convert to fraction form
    389,924.40/538,345.80 = 318,475.92/x
  3. Step 3: Cross multiply
    389,924.40x = 538,345.80 × 318,475.92
  4. Step 4: Simplify right side
    389,924.40x = 171,450,173,933.14
  5. Step 5: Solve for x
    x = 171,450,173,933.14/389,924.40
  6. Step 6: Final answer
    x = 439,701.06

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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.