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Finding the Fourth Proportional to 719,073.70, 992,292.69 and 396,779.60

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Solution

The fourth proportional to 719,073.70, 992,292.69 and 396,779.60 is: 547,539.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    719,073.70 : 992,292.69 = 396,779.60 : x
  2. Step 2: Convert to fraction form
    719,073.70/992,292.69 = 396,779.60/x
  3. Step 3: Cross multiply
    719,073.70x = 992,292.69 × 396,779.60
  4. Step 4: Simplify right side
    719,073.70x = 393,721,496,621.12
  5. Step 5: Solve for x
    x = 393,721,496,621.12/719,073.70
  6. Step 6: Final answer
    x = 547,539.84

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Double scale
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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.