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Finding the Fourth Proportional to 708,289.25, 977,340.54 and 398,147.97

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Solution

The fourth proportional to 708,289.25, 977,340.54 and 398,147.97 is: 549,388.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    708,289.25 : 977,340.54 = 398,147.97 : x
  2. Step 2: Convert to fraction form
    708,289.25/977,340.54 = 398,147.97/x
  3. Step 3: Cross multiply
    708,289.25x = 977,340.54 × 398,147.97
  4. Step 4: Simplify right side
    708,289.25x = 389,126,151,999.70
  5. Step 5: Solve for x
    x = 389,126,151,999.70/708,289.25
  6. Step 6: Final answer
    x = 549,388.76

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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.