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Finding the Fourth Proportional to 719,445.64, 991,912.60 and 589,907.20

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Solution

The fourth proportional to 719,445.64, 991,912.60 and 589,907.20 is: 813,315.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    719,445.64 : 991,912.60 = 589,907.20 : x
  2. Step 2: Convert to fraction form
    719,445.64/991,912.60 = 589,907.20/x
  3. Step 3: Cross multiply
    719,445.64x = 991,912.60 × 589,907.20
  4. Step 4: Simplify right side
    719,445.64x = 585,136,384,510.72
  5. Step 5: Solve for x
    x = 585,136,384,510.72/719,445.64
  6. Step 6: Final answer
    x = 813,315.63

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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.