Home / 385,284.12-531,748.50-221,909.22

Finding the Fourth Proportional to 385,284.12, 531,748.50 and 221,909.22

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Solution

The fourth proportional to 385,284.12, 531,748.50 and 221,909.22 is: 306,267.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,284.12 : 531,748.50 = 221,909.22 : x
  2. Step 2: Convert to fraction form
    385,284.12/531,748.50 = 221,909.22/x
  3. Step 3: Cross multiply
    385,284.12x = 531,748.50 × 221,909.22
  4. Step 4: Simplify right side
    385,284.12x = 117,999,894,871.17
  5. Step 5: Solve for x
    x = 117,999,894,871.17/385,284.12
  6. Step 6: Final answer
    x = 306,267.22

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.