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Finding the Fourth Proportional to 319,141.60, 478,712.40 and 289,617.10

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Solution

The fourth proportional to 319,141.60, 478,712.40 and 289,617.10 is: 434,425.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,141.60 : 478,712.40 = 289,617.10 : x
  2. Step 2: Convert to fraction form
    319,141.60/478,712.40 = 289,617.10/x
  3. Step 3: Cross multiply
    319,141.60x = 478,712.40 × 289,617.10
  4. Step 4: Simplify right side
    319,141.60x = 138,643,297,022.04
  5. Step 5: Solve for x
    x = 138,643,297,022.04/319,141.60
  6. Step 6: Final answer
    x = 434,425.65

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Similar ratio
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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.