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Finding the Fourth Proportional to 319,326.30, 478,989.45 and 303,774.30

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Solution

The fourth proportional to 319,326.30, 478,989.45 and 303,774.30 is: 455,661.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,326.30 : 478,989.45 = 303,774.30 : x
  2. Step 2: Convert to fraction form
    319,326.30/478,989.45 = 303,774.30/x
  3. Step 3: Cross multiply
    319,326.30x = 478,989.45 × 303,774.30
  4. Step 4: Simplify right side
    319,326.30x = 145,504,684,881.14
  5. Step 5: Solve for x
    x = 145,504,684,881.14/319,326.30
  6. Step 6: Final answer
    x = 455,661.45

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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.