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Finding the Fourth Proportional to 808,472.80, 1,212,712.80 and 209,391.40

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Solution

The fourth proportional to 808,472.80, 1,212,712.80 and 209,391.40 is: 314,088.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    808,472.80 : 1,212,712.80 = 209,391.40 : x
  2. Step 2: Convert to fraction form
    808,472.80/1,212,712.80 = 209,391.40/x
  3. Step 3: Cross multiply
    808,472.80x = 1,212,712.80 × 209,391.40
  4. Step 4: Simplify right side
    808,472.80x = 253,931,630,989.92
  5. Step 5: Solve for x
    x = 253,931,630,989.92/808,472.80
  6. Step 6: Final answer
    x = 314,088.03

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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.