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Finding the Fourth Proportional to 370,217.79, 510,518.70 and 316,680.03

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Solution

The fourth proportional to 370,217.79, 510,518.70 and 316,680.03 is: 436,691.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    370,217.79 : 510,518.70 = 316,680.03 : x
  2. Step 2: Convert to fraction form
    370,217.79/510,518.70 = 316,680.03/x
  3. Step 3: Cross multiply
    370,217.79x = 510,518.70 × 316,680.03
  4. Step 4: Simplify right side
    370,217.79x = 161,671,077,231.56
  5. Step 5: Solve for x
    x = 161,671,077,231.56/370,217.79
  6. Step 6: Final answer
    x = 436,691.81

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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.