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Finding the Fourth Proportional to 665,145.60, 997,718.40 and 399,206.40

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Solution

The fourth proportional to 665,145.60, 997,718.40 and 399,206.40 is: 598,809.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,145.60 : 997,718.40 = 399,206.40 : x
  2. Step 2: Convert to fraction form
    665,145.60/997,718.40 = 399,206.40/x
  3. Step 3: Cross multiply
    665,145.60x = 997,718.40 × 399,206.40
  4. Step 4: Simplify right side
    665,145.60x = 398,295,570,677.76
  5. Step 5: Solve for x
    x = 398,295,570,677.76/665,145.60
  6. Step 6: Final answer
    x = 598,809.60

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Similar ratio
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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.