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Finding the Fourth Proportional to 356,376.90, 491,800.10 and 213,136.94

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Solution

The fourth proportional to 356,376.90, 491,800.10 and 213,136.94 is: 294,128.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    356,376.90 : 491,800.10 = 213,136.94 : x
  2. Step 2: Convert to fraction form
    356,376.90/491,800.10 = 213,136.94/x
  3. Step 3: Cross multiply
    356,376.90x = 491,800.10 × 213,136.94
  4. Step 4: Simplify right side
    356,376.90x = 104,820,768,569.51
  5. Step 5: Solve for x
    x = 104,820,768,569.51/356,376.90
  6. Step 6: Final answer
    x = 294,128.96

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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.