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Finding the Fourth Proportional to 356,515.72, 492,215.40 and 229,412.20

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Solution

The fourth proportional to 356,515.72, 492,215.40 and 229,412.20 is: 316,732.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    356,515.72 : 492,215.40 = 229,412.20 : x
  2. Step 2: Convert to fraction form
    356,515.72/492,215.40 = 229,412.20/x
  3. Step 3: Cross multiply
    356,515.72x = 492,215.40 × 229,412.20
  4. Step 4: Simplify right side
    356,515.72x = 112,920,217,787.88
  5. Step 5: Solve for x
    x = 112,920,217,787.88/356,515.72
  6. Step 6: Final answer
    x = 316,732.79

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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.