Home / 289,031.12-432,985.86-212,991.72

Finding the Fourth Proportional to 289,031.12, 432,985.86 and 212,991.72

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Solution

The fourth proportional to 289,031.12, 432,985.86 and 212,991.72 is: 319,074.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,031.12 : 432,985.86 = 212,991.72 : x
  2. Step 2: Convert to fraction form
    289,031.12/432,985.86 = 212,991.72/x
  3. Step 3: Cross multiply
    289,031.12x = 432,985.86 × 212,991.72
  4. Step 4: Simplify right side
    289,031.12x = 92,222,403,057.08
  5. Step 5: Solve for x
    x = 92,222,403,057.08/289,031.12
  6. Step 6: Final answer
    x = 319,074.30

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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.