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Finding the Fourth Proportional to 704,796.95, 972,619.40 and 398,867.77

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Solution

The fourth proportional to 704,796.95, 972,619.40 and 398,867.77 is: 550,437.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    704,796.95 : 972,619.40 = 398,867.77 : x
  2. Step 2: Convert to fraction form
    704,796.95/972,619.40 = 398,867.77/x
  3. Step 3: Cross multiply
    704,796.95x = 972,619.40 × 398,867.77
  4. Step 4: Simplify right side
    704,796.95x = 387,946,531,136.74
  5. Step 5: Solve for x
    x = 387,946,531,136.74/704,796.95
  6. Step 6: Final answer
    x = 550,437.30

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1.5x scale

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.