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Finding the Fourth Proportional to 871,308.80, 1,306,963.20 and 808,323.20

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Solution

The fourth proportional to 871,308.80, 1,306,963.20 and 808,323.20 is: 1,212,484.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    871,308.80 : 1,306,963.20 = 808,323.20 : x
  2. Step 2: Convert to fraction form
    871,308.80/1,306,963.20 = 808,323.20/x
  3. Step 3: Cross multiply
    871,308.80x = 1,306,963.20 × 808,323.20
  4. Step 4: Simplify right side
    871,308.80x = 1,056,448,676,106.24
  5. Step 5: Solve for x
    x = 1,056,448,676,106.24/871,308.80
  6. Step 6: Final answer
    x = 1,212,484.80

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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.