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Finding the Fourth Proportional to 561,818.55, 775,312.84 and 307,169.74

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Solution

The fourth proportional to 561,818.55, 775,312.84 and 307,169.74 is: 423,896.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,818.55 : 775,312.84 = 307,169.74 : x
  2. Step 2: Convert to fraction form
    561,818.55/775,312.84 = 307,169.74/x
  3. Step 3: Cross multiply
    561,818.55x = 775,312.84 × 307,169.74
  4. Step 4: Simplify right side
    561,818.55x = 238,152,643,481.46
  5. Step 5: Solve for x
    x = 238,152,643,481.46/561,818.55
  6. Step 6: Final answer
    x = 423,896.01

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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.