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Finding the Fourth Proportional to 660,479.30, 990,406.69 and 255,861.03

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Solution

The fourth proportional to 660,479.30, 990,406.69 and 255,861.03 is: 383,670.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,479.30 : 990,406.69 = 255,861.03 : x
  2. Step 2: Convert to fraction form
    660,479.30/990,406.69 = 255,861.03/x
  3. Step 3: Cross multiply
    660,479.30x = 990,406.69 × 255,861.03
  4. Step 4: Simplify right side
    660,479.30x = 253,406,475,822.29
  5. Step 5: Solve for x
    x = 253,406,475,822.29/660,479.30
  6. Step 6: Final answer
    x = 383,670.58

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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.