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Finding the Fourth Proportional to 354,588.80, 489,265.61 and 211,362.17

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Solution

The fourth proportional to 354,588.80, 489,265.61 and 211,362.17 is: 291,639.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,588.80 : 489,265.61 = 211,362.17 : x
  2. Step 2: Convert to fraction form
    354,588.80/489,265.61 = 211,362.17/x
  3. Step 3: Cross multiply
    354,588.80x = 489,265.61 × 211,362.17
  4. Step 4: Simplify right side
    354,588.80x = 103,412,237,532.84
  5. Step 5: Solve for x
    x = 103,412,237,532.84/354,588.80
  6. Step 6: Final answer
    x = 291,639.89

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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.