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Finding the Fourth Proportional to 319,362.52, 478,911.98 and 109,017.40

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Solution

The fourth proportional to 319,362.52, 478,911.98 and 109,017.40 is: 163,481.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,362.52 : 478,911.98 = 109,017.40 : x
  2. Step 2: Convert to fraction form
    319,362.52/478,911.98 = 109,017.40/x
  3. Step 3: Cross multiply
    319,362.52x = 478,911.98 × 109,017.40
  4. Step 4: Simplify right side
    319,362.52x = 52,209,738,888.45
  5. Step 5: Solve for x
    x = 52,209,738,888.45/319,362.52
  6. Step 6: Final answer
    x = 163,481.11

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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.