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Finding the Fourth Proportional to 869,365.20, 1,304,695.80 and 448,424.40

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Solution

The fourth proportional to 869,365.20, 1,304,695.80 and 448,424.40 is: 672,970.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    869,365.20 : 1,304,695.80 = 448,424.40 : x
  2. Step 2: Convert to fraction form
    869,365.20/1,304,695.80 = 448,424.40/x
  3. Step 3: Cross multiply
    869,365.20x = 1,304,695.80 × 448,424.40
  4. Step 4: Simplify right side
    869,365.20x = 585,057,431,297.52
  5. Step 5: Solve for x
    x = 585,057,431,297.52/869,365.20
  6. Step 6: Final answer
    x = 672,970.84

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1.5x scale

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.