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Finding the Fourth Proportional to 493,886.80, 740,830.20 and 138,912.40

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Solution

The fourth proportional to 493,886.80, 740,830.20 and 138,912.40 is: 208,368.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    493,886.80 : 740,830.20 = 138,912.40 : x
  2. Step 2: Convert to fraction form
    493,886.80/740,830.20 = 138,912.40/x
  3. Step 3: Cross multiply
    493,886.80x = 740,830.20 × 138,912.40
  4. Step 4: Simplify right side
    493,886.80x = 102,910,501,074.48
  5. Step 5: Solve for x
    x = 102,910,501,074.48/493,886.80
  6. Step 6: Final answer
    x = 208,368.60

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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.