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Finding the Fourth Proportional to 561,551.64, 774,978.66 and 316,596.84

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Solution

The fourth proportional to 561,551.64, 774,978.66 and 316,596.84 is: 436,924.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,551.64 : 774,978.66 = 316,596.84 : x
  2. Step 2: Convert to fraction form
    561,551.64/774,978.66 = 316,596.84/x
  3. Step 3: Cross multiply
    561,551.64x = 774,978.66 × 316,596.84
  4. Step 4: Simplify right side
    561,551.64x = 245,355,794,823.43
  5. Step 5: Solve for x
    x = 245,355,794,823.43/561,551.64
  6. Step 6: Final answer
    x = 436,924.72

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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.