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Finding the Fourth Proportional to 719,810.80, 1,078,420.20 and 345,007.60

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Solution

The fourth proportional to 719,810.80, 1,078,420.20 and 345,007.60 is: 516,890.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    719,810.80 : 1,078,420.20 = 345,007.60 : x
  2. Step 2: Convert to fraction form
    719,810.80/1,078,420.20 = 345,007.60/x
  3. Step 3: Cross multiply
    719,810.80x = 1,078,420.20 × 345,007.60
  4. Step 4: Simplify right side
    719,810.80x = 372,063,164,993.52
  5. Step 5: Solve for x
    x = 372,063,164,993.52/719,810.80
  6. Step 6: Final answer
    x = 516,890.22

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1.5x scale

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.