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Finding the Fourth Proportional to 290,484.80, 435,640.80 and 112,889.60

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Solution

The fourth proportional to 290,484.80, 435,640.80 and 112,889.60 is: 169,300.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,484.80 : 435,640.80 = 112,889.60 : x
  2. Step 2: Convert to fraction form
    290,484.80/435,640.80 = 112,889.60/x
  3. Step 3: Cross multiply
    290,484.80x = 435,640.80 × 112,889.60
  4. Step 4: Simplify right side
    290,484.80x = 49,179,315,655.68
  5. Step 5: Solve for x
    x = 49,179,315,655.68/290,484.80
  6. Step 6: Final answer
    x = 169,300.82

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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.