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Finding the Fourth Proportional to 708,288.87, 977,340.03 and 398,147.60

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Solution

The fourth proportional to 708,288.87, 977,340.03 and 398,147.60 is: 549,388.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    708,288.87 : 977,340.03 = 398,147.60 : x
  2. Step 2: Convert to fraction form
    708,288.87/977,340.03 = 398,147.60/x
  3. Step 3: Cross multiply
    708,288.87x = 977,340.03 × 398,147.60
  4. Step 4: Simplify right side
    708,288.87x = 389,125,588,278.73
  5. Step 5: Solve for x
    x = 389,125,588,278.73/708,288.87
  6. Step 6: Final answer
    x = 549,388.25

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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.