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Finding the Fourth Proportional to 719,762.40, 1,079,643.60 and 689,047.20

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Solution

The fourth proportional to 719,762.40, 1,079,643.60 and 689,047.20 is: 1,033,570.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    719,762.40 : 1,079,643.60 = 689,047.20 : x
  2. Step 2: Convert to fraction form
    719,762.40/1,079,643.60 = 689,047.20/x
  3. Step 3: Cross multiply
    719,762.40x = 1,079,643.60 × 689,047.20
  4. Step 4: Simplify right side
    719,762.40x = 743,925,399,577.92
  5. Step 5: Solve for x
    x = 743,925,399,577.92/719,762.40
  6. Step 6: Final answer
    x = 1,033,570.80

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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.