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Finding the Fourth Proportional to 319,659.60, 478,644.60 and 256,184.40

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Solution

The fourth proportional to 319,659.60, 478,644.60 and 256,184.40 is: 383,599.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,659.60 : 478,644.60 = 256,184.40 : x
  2. Step 2: Convert to fraction form
    319,659.60/478,644.60 = 256,184.40/x
  3. Step 3: Cross multiply
    319,659.60x = 478,644.60 × 256,184.40
  4. Step 4: Simplify right side
    319,659.60x = 122,621,279,664.24
  5. Step 5: Solve for x
    x = 122,621,279,664.24/319,659.60
  6. Step 6: Final answer
    x = 383,599.55

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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.