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Finding the Fourth Proportional to 666,863.50, 920,271.63 and 365,057.50

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Solution

The fourth proportional to 666,863.50, 920,271.63 and 365,057.50 is: 503,779.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,863.50 : 920,271.63 = 365,057.50 : x
  2. Step 2: Convert to fraction form
    666,863.50/920,271.63 = 365,057.50/x
  3. Step 3: Cross multiply
    666,863.50x = 920,271.63 × 365,057.50
  4. Step 4: Simplify right side
    666,863.50x = 335,952,060,568.73
  5. Step 5: Solve for x
    x = 335,952,060,568.73/666,863.50
  6. Step 6: Final answer
    x = 503,779.35

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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.