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Finding the Fourth Proportional to 290,187.40, 435,626.70 and 163,928.20

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Solution

The fourth proportional to 290,187.40, 435,626.70 and 163,928.20 is: 246,087.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,187.40 : 435,626.70 = 163,928.20 : x
  2. Step 2: Convert to fraction form
    290,187.40/435,626.70 = 163,928.20/x
  3. Step 3: Cross multiply
    290,187.40x = 435,626.70 × 163,928.20
  4. Step 4: Simplify right side
    290,187.40x = 71,411,500,802.94
  5. Step 5: Solve for x
    x = 71,411,500,802.94/290,187.40
  6. Step 6: Final answer
    x = 246,087.53

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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.