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Finding the Fourth Proportional to 478,493.96, 660,315.57 and 260,711.70

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Solution

The fourth proportional to 478,493.96, 660,315.57 and 260,711.70 is: 359,778.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,493.96 : 660,315.57 = 260,711.70 : x
  2. Step 2: Convert to fraction form
    478,493.96/660,315.57 = 260,711.70/x
  3. Step 3: Cross multiply
    478,493.96x = 660,315.57 × 260,711.70
  4. Step 4: Simplify right side
    478,493.96x = 172,151,993,813.50
  5. Step 5: Solve for x
    x = 172,151,993,813.50/478,493.96
  6. Step 6: Final answer
    x = 359,778.82

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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.