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Finding the Fourth Proportional to 319,999.40, 478,832.70 and 292,005.80

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Solution

The fourth proportional to 319,999.40, 478,832.70 and 292,005.80 is: 436,944.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,999.40 : 478,832.70 = 292,005.80 : x
  2. Step 2: Convert to fraction form
    319,999.40/478,832.70 = 292,005.80/x
  3. Step 3: Cross multiply
    319,999.40x = 478,832.70 × 292,005.80
  4. Step 4: Simplify right side
    319,999.40x = 139,821,925,629.66
  5. Step 5: Solve for x
    x = 139,821,925,629.66/319,999.40
  6. Step 6: Final answer
    x = 436,944.34

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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.