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Finding the Fourth Proportional to 719,061.36, 992,303.52 and 396,771.20

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Solution

The fourth proportional to 719,061.36, 992,303.52 and 396,771.20 is: 547,543.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    719,061.36 : 992,303.52 = 396,771.20 : x
  2. Step 2: Convert to fraction form
    719,061.36/992,303.52 = 396,771.20/x
  3. Step 3: Cross multiply
    719,061.36x = 992,303.52 × 396,771.20
  4. Step 4: Simplify right side
    719,061.36x = 393,717,458,394.62
  5. Step 5: Solve for x
    x = 393,717,458,394.62/719,061.36
  6. Step 6: Final answer
    x = 547,543.62

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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.