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Finding the Fourth Proportional to 665,008.80, 997,642.80 and 285,928.80

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Solution

The fourth proportional to 665,008.80, 997,642.80 and 285,928.80 is: 428,948.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,008.80 : 997,642.80 = 285,928.80 : x
  2. Step 2: Convert to fraction form
    665,008.80/997,642.80 = 285,928.80/x
  3. Step 3: Cross multiply
    665,008.80x = 997,642.80 × 285,928.80
  4. Step 4: Simplify right side
    665,008.80x = 285,254,808,632.64
  5. Step 5: Solve for x
    x = 285,254,808,632.64/665,008.80
  6. Step 6: Final answer
    x = 428,948.92

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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.