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Finding the Fourth Proportional to 478,642.15, 660,522.90 and 263,782.36

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Solution

The fourth proportional to 478,642.15, 660,522.90 and 263,782.36 is: 364,017.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,642.15 : 660,522.90 = 263,782.36 : x
  2. Step 2: Convert to fraction form
    478,642.15/660,522.90 = 263,782.36/x
  3. Step 3: Cross multiply
    478,642.15x = 660,522.90 × 263,782.36
  4. Step 4: Simplify right side
    478,642.15x = 174,234,289,396.04
  5. Step 5: Solve for x
    x = 174,234,289,396.04/478,642.15
  6. Step 6: Final answer
    x = 364,017.86

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1.5x scale

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.