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Finding the Fourth Proportional to 665,017.80, 997,656.30 and 265,590.60

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Solution

The fourth proportional to 665,017.80, 997,656.30 and 265,590.60 is: 398,437.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,017.80 : 997,656.30 = 265,590.60 : x
  2. Step 2: Convert to fraction form
    665,017.80/997,656.30 = 265,590.60/x
  3. Step 3: Cross multiply
    665,017.80x = 997,656.30 × 265,590.60
  4. Step 4: Simplify right side
    665,017.80x = 264,968,135,310.78
  5. Step 5: Solve for x
    x = 264,968,135,310.78/665,017.80
  6. Step 6: Final answer
    x = 398,437.66

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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.