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Finding the Fourth Proportional to 706,298.40, 1,057,892.40 and 612,986.40

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Solution

The fourth proportional to 706,298.40, 1,057,892.40 and 612,986.40 is: 918,129.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    706,298.40 : 1,057,892.40 = 612,986.40 : x
  2. Step 2: Convert to fraction form
    706,298.40/1,057,892.40 = 612,986.40/x
  3. Step 3: Cross multiply
    706,298.40x = 1,057,892.40 × 612,986.40
  4. Step 4: Simplify right side
    706,298.40x = 648,473,653,863.36
  5. Step 5: Solve for x
    x = 648,473,653,863.36/706,298.40
  6. Step 6: Final answer
    x = 918,129.86

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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.