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Finding the Fourth Proportional to 661,978.50, 913,530.36 and 360,174.66

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Solution

The fourth proportional to 661,978.50, 913,530.36 and 360,174.66 is: 497,041.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,978.50 : 913,530.36 = 360,174.66 : x
  2. Step 2: Convert to fraction form
    661,978.50/913,530.36 = 360,174.66/x
  3. Step 3: Cross multiply
    661,978.50x = 913,530.36 × 360,174.66
  4. Step 4: Simplify right side
    661,978.50x = 329,030,486,812.68
  5. Step 5: Solve for x
    x = 329,030,486,812.68/661,978.50
  6. Step 6: Final answer
    x = 497,041.05

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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.