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Finding the Fourth Proportional to 492,001.49, 678,993.23 and 285,312.17

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Solution

The fourth proportional to 492,001.49, 678,993.23 and 285,312.17 is: 393,748.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    492,001.49 : 678,993.23 = 285,312.17 : x
  2. Step 2: Convert to fraction form
    492,001.49/678,993.23 = 285,312.17/x
  3. Step 3: Cross multiply
    492,001.49x = 678,993.23 × 285,312.17
  4. Step 4: Simplify right side
    492,001.49x = 193,725,031,866.61
  5. Step 5: Solve for x
    x = 193,725,031,866.61/492,001.49
  6. Step 6: Final answer
    x = 393,748.87

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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.