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Finding the Fourth Proportional to 319,151.70, 478,727.55 and 219,618.90

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Solution

The fourth proportional to 319,151.70, 478,727.55 and 219,618.90 is: 329,428.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,151.70 : 478,727.55 = 219,618.90 : x
  2. Step 2: Convert to fraction form
    319,151.70/478,727.55 = 219,618.90/x
  3. Step 3: Cross multiply
    319,151.70x = 478,727.55 × 219,618.90
  4. Step 4: Simplify right side
    319,151.70x = 105,137,617,930.70
  5. Step 5: Solve for x
    x = 105,137,617,930.70/319,151.70
  6. Step 6: Final answer
    x = 329,428.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.