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Finding the Fourth Proportional to 290,658.40, 436,009.20 and 103,645.60

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Solution

The fourth proportional to 290,658.40, 436,009.20 and 103,645.60 is: 155,476.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,658.40 : 436,009.20 = 103,645.60 : x
  2. Step 2: Convert to fraction form
    290,658.40/436,009.20 = 103,645.60/x
  3. Step 3: Cross multiply
    290,658.40x = 436,009.20 × 103,645.60
  4. Step 4: Simplify right side
    290,658.40x = 45,190,435,139.52
  5. Step 5: Solve for x
    x = 45,190,435,139.52/290,658.40
  6. Step 6: Final answer
    x = 155,476.10

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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.