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Finding the Fourth Proportional to 665,087.50, 917,820.85 and 363,281.50

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Solution

The fourth proportional to 665,087.50, 917,820.85 and 363,281.50 is: 501,328.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,087.50 : 917,820.85 = 363,281.50 : x
  2. Step 2: Convert to fraction form
    665,087.50/917,820.85 = 363,281.50/x
  3. Step 3: Cross multiply
    665,087.50x = 917,820.85 × 363,281.50
  4. Step 4: Simplify right side
    665,087.50x = 333,427,335,119.28
  5. Step 5: Solve for x
    x = 333,427,335,119.28/665,087.50
  6. Step 6: Final answer
    x = 501,328.52

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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.