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Finding the Fourth Proportional to 292,536, 438,804 and 70,920

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Solution

The fourth proportional to 292,536, 438,804 and 70,920 is: 106,380

Step by Step Solution

  1. Step 1: Write the proportion equation
    292,536 : 438,804 = 70,920 : x
  2. Step 2: Convert to fraction form
    292,536/438,804 = 70,920/x
  3. Step 3: Cross multiply
    292,536x = 438,804 × 70,920
  4. Step 4: Simplify right side
    292,536x = 31,119,979,680
  5. Step 5: Solve for x
    x = 31,119,979,680/292,536
  6. Step 6: Final answer
    x = 106,380

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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.