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Finding the Fourth Proportional to 561,336.32, 774,643.20 and 306,687.44

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Solution

The fourth proportional to 561,336.32, 774,643.20 and 306,687.44 is: 423,228.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,336.32 : 774,643.20 = 306,687.44 : x
  2. Step 2: Convert to fraction form
    561,336.32/774,643.20 = 306,687.44/x
  3. Step 3: Cross multiply
    561,336.32x = 774,643.20 × 306,687.44
  4. Step 4: Simplify right side
    561,336.32x = 237,573,339,921.41
  5. Step 5: Solve for x
    x = 237,573,339,921.41/561,336.32
  6. Step 6: Final answer
    x = 423,228.16

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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.