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Finding the Fourth Proportional to 356,215.34, 491,364.59 and 308,385.65

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Solution

The fourth proportional to 356,215.34, 491,364.59 and 308,385.65 is: 425,388.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    356,215.34 : 491,364.59 = 308,385.65 : x
  2. Step 2: Convert to fraction form
    356,215.34/491,364.59 = 308,385.65/x
  3. Step 3: Cross multiply
    356,215.34x = 491,364.59 × 308,385.65
  4. Step 4: Simplify right side
    356,215.34x = 151,529,788,160.62
  5. Step 5: Solve for x
    x = 151,529,788,160.62/356,215.34
  6. Step 6: Final answer
    x = 425,388.16

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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.