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Finding the Fourth Proportional to 292,600, 438,900.18 and 70,984

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Solution

The fourth proportional to 292,600, 438,900.18 and 70,984 is: 106,476.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    292,600 : 438,900.18 = 70,984 : x
  2. Step 2: Convert to fraction form
    292,600/438,900.18 = 70,984/x
  3. Step 3: Cross multiply
    292,600x = 438,900.18 × 70,984
  4. Step 4: Simplify right side
    292,600x = 31,154,890,377.12
  5. Step 5: Solve for x
    x = 31,154,890,377.12/292,600
  6. Step 6: Final answer
    x = 106,476.04

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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.