Home / 686,502.80-1,029,851.40-213,138.80

Finding the Fourth Proportional to 686,502.80, 1,029,851.40 and 213,138.80

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Solution

The fourth proportional to 686,502.80, 1,029,851.40 and 213,138.80 is: 319,738.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,502.80 : 1,029,851.40 = 213,138.80 : x
  2. Step 2: Convert to fraction form
    686,502.80/1,029,851.40 = 213,138.80/x
  3. Step 3: Cross multiply
    686,502.80x = 1,029,851.40 × 213,138.80
  4. Step 4: Simplify right side
    686,502.80x = 219,501,291,574.32
  5. Step 5: Solve for x
    x = 219,501,291,574.32/686,502.80
  6. Step 6: Final answer
    x = 319,738.38

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.