Home / 686,458.80-1,029,785.40-213,094.80

Finding the Fourth Proportional to 686,458.80, 1,029,785.40 and 213,094.80

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Solution

The fourth proportional to 686,458.80, 1,029,785.40 and 213,094.80 is: 319,672.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,458.80 : 1,029,785.40 = 213,094.80 : x
  2. Step 2: Convert to fraction form
    686,458.80/1,029,785.40 = 213,094.80/x
  3. Step 3: Cross multiply
    686,458.80x = 1,029,785.40 × 213,094.80
  4. Step 4: Simplify right side
    686,458.80x = 219,441,913,855.92
  5. Step 5: Solve for x
    x = 219,441,913,855.92/686,458.80
  6. Step 6: Final answer
    x = 319,672.37

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1.5x scale

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.