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Finding the Fourth Proportional to 1,312,650.57, 1,811,447.06 and 731,866.80

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Solution

The fourth proportional to 1,312,650.57, 1,811,447.06 and 731,866.80 is: 1,009,970.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,312,650.57 : 1,811,447.06 = 731,866.80 : x
  2. Step 2: Convert to fraction form
    1,312,650.57/1,811,447.06 = 731,866.80/x
  3. Step 3: Cross multiply
    1,312,650.57x = 1,811,447.06 × 731,866.80
  4. Step 4: Simplify right side
    1,312,650.57x = 1,325,737,963,171.61
  5. Step 5: Solve for x
    x = 1,325,737,963,171.61/1,312,650.57
  6. Step 6: Final answer
    x = 1,009,970.20

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.