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Finding the Fourth Proportional to 316,725.48, 436,343.14 and 221,063.40

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Solution

The fourth proportional to 316,725.48, 436,343.14 and 221,063.40 is: 304,552.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,725.48 : 436,343.14 = 221,063.40 : x
  2. Step 2: Convert to fraction form
    316,725.48/436,343.14 = 221,063.40/x
  3. Step 3: Cross multiply
    316,725.48x = 436,343.14 × 221,063.40
  4. Step 4: Simplify right side
    316,725.48x = 96,459,498,095.08
  5. Step 5: Solve for x
    x = 96,459,498,095.08/316,725.48
  6. Step 6: Final answer
    x = 304,552.38

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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.