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Finding the Fourth Proportional to 700,986.60, 967,412.56 and 390,910.16

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Solution

The fourth proportional to 700,986.60, 967,412.56 and 390,910.16 is: 539,484.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    700,986.60 : 967,412.56 = 390,910.16 : x
  2. Step 2: Convert to fraction form
    700,986.60/967,412.56 = 390,910.16/x
  3. Step 3: Cross multiply
    700,986.60x = 967,412.56 × 390,910.16
  4. Step 4: Simplify right side
    700,986.60x = 378,171,398,615.61
  5. Step 5: Solve for x
    x = 378,171,398,615.61/700,986.60
  6. Step 6: Final answer
    x = 539,484.49

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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.