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Finding the Fourth Proportional to 519,315.80, 778,973.70 and 164,438.60

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Solution

The fourth proportional to 519,315.80, 778,973.70 and 164,438.60 is: 246,657.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,315.80 : 778,973.70 = 164,438.60 : x
  2. Step 2: Convert to fraction form
    519,315.80/778,973.70 = 164,438.60/x
  3. Step 3: Cross multiply
    519,315.80x = 778,973.70 × 164,438.60
  4. Step 4: Simplify right side
    519,315.80x = 128,093,344,664.82
  5. Step 5: Solve for x
    x = 128,093,344,664.82/519,315.80
  6. Step 6: Final answer
    x = 246,657.90

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.