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Finding the Fourth Proportional to 290,219.40, 400,480.80 and 162,870.39

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Solution

The fourth proportional to 290,219.40, 400,480.80 and 162,870.39 is: 224,748.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,219.40 : 400,480.80 = 162,870.39 : x
  2. Step 2: Convert to fraction form
    290,219.40/400,480.80 = 162,870.39/x
  3. Step 3: Cross multiply
    290,219.40x = 400,480.80 × 162,870.39
  4. Step 4: Simplify right side
    290,219.40x = 65,226,464,083.51
  5. Step 5: Solve for x
    x = 65,226,464,083.51/290,219.40
  6. Step 6: Final answer
    x = 224,748.81

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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.