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Finding the Fourth Proportional to 478,638.98, 660,521.79 and 263,779.04

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Solution

The fourth proportional to 478,638.98, 660,521.79 and 263,779.04 is: 364,015.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,638.98 : 660,521.79 = 263,779.04 : x
  2. Step 2: Convert to fraction form
    478,638.98/660,521.79 = 263,779.04/x
  3. Step 3: Cross multiply
    478,638.98x = 660,521.79 × 263,779.04
  4. Step 4: Simplify right side
    478,638.98x = 174,231,800,362.67
  5. Step 5: Solve for x
    x = 174,231,800,362.67/478,638.98
  6. Step 6: Final answer
    x = 364,015.07

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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.