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Finding the Fourth Proportional to 1,409,470.47, 1,945,070.42 and 764,890.64

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Solution

The fourth proportional to 1,409,470.47, 1,945,070.42 and 764,890.64 is: 1,055,549.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,409,470.47 : 1,945,070.42 = 764,890.64 : x
  2. Step 2: Convert to fraction form
    1,409,470.47/1,945,070.42 = 764,890.64/x
  3. Step 3: Cross multiply
    1,409,470.47x = 1,945,070.42 × 764,890.64
  4. Step 4: Simplify right side
    1,409,470.47x = 1,487,766,163,084.10
  5. Step 5: Solve for x
    x = 1,487,766,163,084.10/1,409,470.47
  6. Step 6: Final answer
    x = 1,055,549.72

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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.