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Finding the Fourth Proportional to 639,641.50, 882,783.04 and 371,369.50

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Solution

The fourth proportional to 639,641.50, 882,783.04 and 371,369.50 is: 512,535.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,641.50 : 882,783.04 = 371,369.50 : x
  2. Step 2: Convert to fraction form
    639,641.50/882,783.04 = 371,369.50/x
  3. Step 3: Cross multiply
    639,641.50x = 882,783.04 × 371,369.50
  4. Step 4: Simplify right side
    639,641.50x = 327,838,696,173.28
  5. Step 5: Solve for x
    x = 327,838,696,173.28/639,641.50
  6. Step 6: Final answer
    x = 512,535.06

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.