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Finding the Fourth Proportional to 873,783.80, 1,310,675.70 and 747,812.60

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Solution

The fourth proportional to 873,783.80, 1,310,675.70 and 747,812.60 is: 1,121,718.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    873,783.80 : 1,310,675.70 = 747,812.60 : x
  2. Step 2: Convert to fraction form
    873,783.80/1,310,675.70 = 747,812.60/x
  3. Step 3: Cross multiply
    873,783.80x = 1,310,675.70 × 747,812.60
  4. Step 4: Simplify right side
    873,783.80x = 980,139,802,973.82
  5. Step 5: Solve for x
    x = 980,139,802,973.82/873,783.80
  6. Step 6: Final answer
    x = 1,121,718.90

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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.