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Finding the Fourth Proportional to 311,394.47, 429,756.11 and 190,615.58

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Solution

The fourth proportional to 311,394.47, 429,756.11 and 190,615.58 is: 263,068.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,394.47 : 429,756.11 = 190,615.58 : x
  2. Step 2: Convert to fraction form
    311,394.47/429,756.11 = 190,615.58/x
  3. Step 3: Cross multiply
    311,394.47x = 429,756.11 × 190,615.58
  4. Step 4: Simplify right side
    311,394.47x = 81,918,207,064.34
  5. Step 5: Solve for x
    x = 81,918,207,064.34/311,394.47
  6. Step 6: Final answer
    x = 263,068.92

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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.