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Finding the Fourth Proportional to 292,482, 438,725.28 and 70,866

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Solution

The fourth proportional to 292,482, 438,725.28 and 70,866 is: 106,299.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    292,482 : 438,725.28 = 70,866 : x
  2. Step 2: Convert to fraction form
    292,482/438,725.28 = 70,866/x
  3. Step 3: Cross multiply
    292,482x = 438,725.28 × 70,866
  4. Step 4: Simplify right side
    292,482x = 31,090,705,692.48
  5. Step 5: Solve for x
    x = 31,090,705,692.48/292,482
  6. Step 6: Final answer
    x = 106,299.55

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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.