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Finding the Fourth Proportional to 356,915.09, 534,320.78 and 312,628.34

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Solution

The fourth proportional to 356,915.09, 534,320.78 and 312,628.34 is: 468,021.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    356,915.09 : 534,320.78 = 312,628.34 : x
  2. Step 2: Convert to fraction form
    356,915.09/534,320.78 = 312,628.34/x
  3. Step 3: Cross multiply
    356,915.09x = 534,320.78 × 312,628.34
  4. Step 4: Simplify right side
    356,915.09x = 167,043,816,915.76
  5. Step 5: Solve for x
    x = 167,043,816,915.76/356,915.09
  6. Step 6: Final answer
    x = 468,021.17

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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.