Home / 739,857.80-1,109,786.70-290,429.30

Finding the Fourth Proportional to 739,857.80, 1,109,786.70 and 290,429.30

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Solution

The fourth proportional to 739,857.80, 1,109,786.70 and 290,429.30 is: 435,643.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    739,857.80 : 1,109,786.70 = 290,429.30 : x
  2. Step 2: Convert to fraction form
    739,857.80/1,109,786.70 = 290,429.30/x
  3. Step 3: Cross multiply
    739,857.80x = 1,109,786.70 × 290,429.30
  4. Step 4: Simplify right side
    739,857.80x = 322,314,574,430.31
  5. Step 5: Solve for x
    x = 322,314,574,430.31/739,857.80
  6. Step 6: Final answer
    x = 435,643.95

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Double scale
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Similar ratio
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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.