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Finding the Fourth Proportional to 661,911.72, 913,409.36 and 367,543.12

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Solution

The fourth proportional to 661,911.72, 913,409.36 and 367,543.12 is: 507,193.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,911.72 : 913,409.36 = 367,543.12 : x
  2. Step 2: Convert to fraction form
    661,911.72/913,409.36 = 367,543.12/x
  3. Step 3: Cross multiply
    661,911.72x = 913,409.36 × 367,543.12
  4. Step 4: Simplify right side
    661,911.72x = 335,717,326,011.60
  5. Step 5: Solve for x
    x = 335,717,326,011.60/661,911.72
  6. Step 6: Final answer
    x = 507,193.51

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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.