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Finding the Fourth Proportional to 665,087, 917,820.16 and 363,281

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Solution

The fourth proportional to 665,087, 917,820.16 and 363,281 is: 501,327.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,087 : 917,820.16 = 363,281 : x
  2. Step 2: Convert to fraction form
    665,087/917,820.16 = 363,281/x
  3. Step 3: Cross multiply
    665,087x = 917,820.16 × 363,281
  4. Step 4: Simplify right side
    665,087x = 333,426,625,544.96
  5. Step 5: Solve for x
    x = 333,426,625,544.96/665,087
  6. Step 6: Final answer
    x = 501,327.83

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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.