Home / 686,445.04-1,029,656.52-213,130.85

Finding the Fourth Proportional to 686,445.04, 1,029,656.52 and 213,130.85

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Solution

The fourth proportional to 686,445.04, 1,029,656.52 and 213,130.85 is: 319,692.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,445.04 : 1,029,656.52 = 213,130.85 : x
  2. Step 2: Convert to fraction form
    686,445.04/1,029,656.52 = 213,130.85/x
  3. Step 3: Cross multiply
    686,445.04x = 1,029,656.52 × 213,130.85
  4. Step 4: Simplify right side
    686,445.04x = 219,451,571,889.78
  5. Step 5: Solve for x
    x = 219,451,571,889.78/686,445.04
  6. Step 6: Final answer
    x = 319,692.85

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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.