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Finding the Fourth Proportional to 319,116.60, 478,674.90 and 262,035.90

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Solution

The fourth proportional to 319,116.60, 478,674.90 and 262,035.90 is: 393,053.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,116.60 : 478,674.90 = 262,035.90 : x
  2. Step 2: Convert to fraction form
    319,116.60/478,674.90 = 262,035.90/x
  3. Step 3: Cross multiply
    319,116.60x = 478,674.90 × 262,035.90
  4. Step 4: Simplify right side
    319,116.60x = 125,430,008,228.91
  5. Step 5: Solve for x
    x = 125,430,008,228.91/319,116.60
  6. Step 6: Final answer
    x = 393,053.85

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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.