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Finding the Fourth Proportional to 668,721.80, 922,828.38 and 366,915.80

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Solution

The fourth proportional to 668,721.80, 922,828.38 and 366,915.80 is: 506,339.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    668,721.80 : 922,828.38 = 366,915.80 : x
  2. Step 2: Convert to fraction form
    668,721.80/922,828.38 = 366,915.80/x
  3. Step 3: Cross multiply
    668,721.80x = 922,828.38 × 366,915.80
  4. Step 4: Simplify right side
    668,721.80x = 338,600,313,310.40
  5. Step 5: Solve for x
    x = 338,600,313,310.40/668,721.80
  6. Step 6: Final answer
    x = 506,339.58

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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.