Home / 318,943.40-478,451.99-105,730.04

Finding the Fourth Proportional to 318,943.40, 478,451.99 and 105,730.04

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Solution

The fourth proportional to 318,943.40, 478,451.99 and 105,730.04 is: 158,607.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,943.40 : 478,451.99 = 105,730.04 : x
  2. Step 2: Convert to fraction form
    318,943.40/478,451.99 = 105,730.04/x
  3. Step 3: Cross multiply
    318,943.40x = 478,451.99 × 105,730.04
  4. Step 4: Simplify right side
    318,943.40x = 50,586,749,501.23
  5. Step 5: Solve for x
    x = 50,586,749,501.23/318,943.40
  6. Step 6: Final answer
    x = 158,607.30

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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.