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Finding the Fourth Proportional to 561,159.60, 774,399.39 and 306,510.78

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Solution

The fourth proportional to 561,159.60, 774,399.39 and 306,510.78 is: 422,984.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,159.60 : 774,399.39 = 306,510.78 : x
  2. Step 2: Convert to fraction form
    561,159.60/774,399.39 = 306,510.78/x
  3. Step 3: Cross multiply
    561,159.60x = 774,399.39 × 306,510.78
  4. Step 4: Simplify right side
    561,159.60x = 237,361,762,815.01
  5. Step 5: Solve for x
    x = 237,361,762,815.01/561,159.60
  6. Step 6: Final answer
    x = 422,984.41

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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.