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Finding the Fourth Proportional to 561,322.88, 774,636.72 and 306,689.84

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Solution

The fourth proportional to 561,322.88, 774,636.72 and 306,689.84 is: 423,238.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,322.88 : 774,636.72 = 306,689.84 : x
  2. Step 2: Convert to fraction form
    561,322.88/774,636.72 = 306,689.84/x
  3. Step 3: Cross multiply
    561,322.88x = 774,636.72 × 306,689.84
  4. Step 4: Simplify right side
    561,322.88x = 237,573,211,714.93
  5. Step 5: Solve for x
    x = 237,573,211,714.93/561,322.88
  6. Step 6: Final answer
    x = 423,238.07

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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.