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Finding the Fourth Proportional to 290,368.88, 400,720.36 and 161,317.10

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Solution

The fourth proportional to 290,368.88, 400,720.36 and 161,317.10 is: 222,623.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,368.88 : 400,720.36 = 161,317.10 : x
  2. Step 2: Convert to fraction form
    290,368.88/400,720.36 = 161,317.10/x
  3. Step 3: Cross multiply
    290,368.88x = 400,720.36 × 161,317.10
  4. Step 4: Simplify right side
    290,368.88x = 64,643,046,386.16
  5. Step 5: Solve for x
    x = 64,643,046,386.16/290,368.88
  6. Step 6: Final answer
    x = 222,623.88

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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.