Home / 389,631.40-584,447.10-212,484.40

Finding the Fourth Proportional to 389,631.40, 584,447.10 and 212,484.40

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Solution

The fourth proportional to 389,631.40, 584,447.10 and 212,484.40 is: 318,726.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,631.40 : 584,447.10 = 212,484.40 : x
  2. Step 2: Convert to fraction form
    389,631.40/584,447.10 = 212,484.40/x
  3. Step 3: Cross multiply
    389,631.40x = 584,447.10 × 212,484.40
  4. Step 4: Simplify right side
    389,631.40x = 124,185,891,375.24
  5. Step 5: Solve for x
    x = 124,185,891,375.24/389,631.40
  6. Step 6: Final answer
    x = 318,726.60

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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.