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Finding the Fourth Proportional to 491,721.60, 678,601.08 and 300,675.12

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Solution

The fourth proportional to 491,721.60, 678,601.08 and 300,675.12 is: 414,947.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    491,721.60 : 678,601.08 = 300,675.12 : x
  2. Step 2: Convert to fraction form
    491,721.60/678,601.08 = 300,675.12/x
  3. Step 3: Cross multiply
    491,721.60x = 678,601.08 × 300,675.12
  4. Step 4: Simplify right side
    491,721.60x = 204,038,461,161.13
  5. Step 5: Solve for x
    x = 204,038,461,161.13/491,721.60
  6. Step 6: Final answer
    x = 414,947.12

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1.5x scale

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.