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Finding the Fourth Proportional to 665,139.60, 997,417.80 and 265,647.60

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Solution

The fourth proportional to 665,139.60, 997,417.80 and 265,647.60 is: 398,354.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,139.60 : 997,417.80 = 265,647.60 : x
  2. Step 2: Convert to fraction form
    665,139.60/997,417.80 = 265,647.60/x
  3. Step 3: Cross multiply
    665,139.60x = 997,417.80 × 265,647.60
  4. Step 4: Simplify right side
    665,139.60x = 264,961,644,767.28
  5. Step 5: Solve for x
    x = 264,961,644,767.28/665,139.60
  6. Step 6: Final answer
    x = 398,354.94

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.