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Finding the Fourth Proportional to 290,425.80, 435,638.70 and 216,697.80

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Solution

The fourth proportional to 290,425.80, 435,638.70 and 216,697.80 is: 325,046.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,425.80 : 435,638.70 = 216,697.80 : x
  2. Step 2: Convert to fraction form
    290,425.80/435,638.70 = 216,697.80/x
  3. Step 3: Cross multiply
    290,425.80x = 435,638.70 × 216,697.80
  4. Step 4: Simplify right side
    290,425.80x = 94,401,947,884.86
  5. Step 5: Solve for x
    x = 94,401,947,884.86/290,425.80
  6. Step 6: Final answer
    x = 325,046.70

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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.