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Finding the Fourth Proportional to 556,621.76, 768,138.30 and 301,972.88

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Solution

The fourth proportional to 556,621.76, 768,138.30 and 301,972.88 is: 416,722.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    556,621.76 : 768,138.30 = 301,972.88 : x
  2. Step 2: Convert to fraction form
    556,621.76/768,138.30 = 301,972.88/x
  3. Step 3: Cross multiply
    556,621.76x = 768,138.30 × 301,972.88
  4. Step 4: Simplify right side
    556,621.76x = 231,956,930,848.61
  5. Step 5: Solve for x
    x = 231,956,930,848.61/556,621.76
  6. Step 6: Final answer
    x = 416,722.72

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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.