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Finding the Fourth Proportional to 292,603.50, 438,905.43 and 70,987.50

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Solution

The fourth proportional to 292,603.50, 438,905.43 and 70,987.50 is: 106,481.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    292,603.50 : 438,905.43 = 70,987.50 : x
  2. Step 2: Convert to fraction form
    292,603.50/438,905.43 = 70,987.50/x
  3. Step 3: Cross multiply
    292,603.50x = 438,905.43 × 70,987.50
  4. Step 4: Simplify right side
    292,603.50x = 31,156,799,212.13
  5. Step 5: Solve for x
    x = 31,156,799,212.13/292,603.50
  6. Step 6: Final answer
    x = 106,481.29

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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.