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Finding the Fourth Proportional to 505,201.71, 697,074.28 and 290,300.25

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Solution

The fourth proportional to 505,201.71, 697,074.28 and 290,300.25 is: 400,554.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    505,201.71 : 697,074.28 = 290,300.25 : x
  2. Step 2: Convert to fraction form
    505,201.71/697,074.28 = 290,300.25/x
  3. Step 3: Cross multiply
    505,201.71x = 697,074.28 × 290,300.25
  4. Step 4: Simplify right side
    505,201.71x = 202,360,839,422.46
  5. Step 5: Solve for x
    x = 202,360,839,422.46/505,201.71
  6. Step 6: Final answer
    x = 400,554.54

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Double scale
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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.