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Finding the Fourth Proportional to 478,638.90, 660,521.88 and 263,777.07

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Solution

The fourth proportional to 478,638.90, 660,521.88 and 263,777.07 is: 364,012.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,638.90 : 660,521.88 = 263,777.07 : x
  2. Step 2: Convert to fraction form
    478,638.90/660,521.88 = 263,777.07/x
  3. Step 3: Cross multiply
    478,638.90x = 660,521.88 × 263,777.07
  4. Step 4: Simplify right side
    478,638.90x = 174,230,526,177.29
  5. Step 5: Solve for x
    x = 174,230,526,177.29/478,638.90
  6. Step 6: Final answer
    x = 364,012.47

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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.