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Finding the Fourth Proportional to 719,405.02, 992,779.12 and 397,115.34

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Solution

The fourth proportional to 719,405.02, 992,779.12 and 397,115.34 is: 548,019.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    719,405.02 : 992,779.12 = 397,115.34 : x
  2. Step 2: Convert to fraction form
    719,405.02/992,779.12 = 397,115.34/x
  3. Step 3: Cross multiply
    719,405.02x = 992,779.12 × 397,115.34
  4. Step 4: Simplify right side
    719,405.02x = 394,247,812,323.40
  5. Step 5: Solve for x
    x = 394,247,812,323.40/719,405.02
  6. Step 6: Final answer
    x = 548,019.27

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1.5x scale

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.