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Finding the Fourth Proportional to 665,712.72, 998,543.16 and 366,786

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Solution

The fourth proportional to 665,712.72, 998,543.16 and 366,786 is: 550,164.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,712.72 : 998,543.16 = 366,786 : x
  2. Step 2: Convert to fraction form
    665,712.72/998,543.16 = 366,786/x
  3. Step 3: Cross multiply
    665,712.72x = 998,543.16 × 366,786
  4. Step 4: Simplify right side
    665,712.72x = 366,251,651,483.76
  5. Step 5: Solve for x
    x = 366,251,651,483.76/665,712.72
  6. Step 6: Final answer
    x = 550,164.72

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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.