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Finding the Fourth Proportional to 318,653.58, 478,052.38 and 105,420.98

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Solution

The fourth proportional to 318,653.58, 478,052.38 and 105,420.98 is: 158,155.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,653.58 : 478,052.38 = 105,420.98 : x
  2. Step 2: Convert to fraction form
    318,653.58/478,052.38 = 105,420.98/x
  3. Step 3: Cross multiply
    318,653.58x = 478,052.38 × 105,420.98
  4. Step 4: Simplify right side
    318,653.58x = 50,396,750,390.93
  5. Step 5: Solve for x
    x = 50,396,750,390.93/318,653.58
  6. Step 6: Final answer
    x = 158,155.29

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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.