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Finding the Fourth Proportional to 707,218.40, 1,059,272.40 and 613,906.40

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Solution

The fourth proportional to 707,218.40, 1,059,272.40 and 613,906.40 is: 919,509.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    707,218.40 : 1,059,272.40 = 613,906.40 : x
  2. Step 2: Convert to fraction form
    707,218.40/1,059,272.40 = 613,906.40/x
  3. Step 3: Cross multiply
    707,218.40x = 1,059,272.40 × 613,906.40
  4. Step 4: Simplify right side
    707,218.40x = 650,294,105,703.36
  5. Step 5: Solve for x
    x = 650,294,105,703.36/707,218.40
  6. Step 6: Final answer
    x = 919,509.60

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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.