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Finding the Fourth Proportional to 806,476.80, 1,209,715.20 and 245,438.40

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Solution

The fourth proportional to 806,476.80, 1,209,715.20 and 245,438.40 is: 368,157.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    806,476.80 : 1,209,715.20 = 245,438.40 : x
  2. Step 2: Convert to fraction form
    806,476.80/1,209,715.20 = 245,438.40/x
  3. Step 3: Cross multiply
    806,476.80x = 1,209,715.20 × 245,438.40
  4. Step 4: Simplify right side
    806,476.80x = 296,910,563,143.68
  5. Step 5: Solve for x
    x = 296,910,563,143.68/806,476.80
  6. Step 6: Final answer
    x = 368,157.60

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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.