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Finding the Fourth Proportional to 208,897.40, 313,346.10 and 103,921.40

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Solution

The fourth proportional to 208,897.40, 313,346.10 and 103,921.40 is: 155,882.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,897.40 : 313,346.10 = 103,921.40 : x
  2. Step 2: Convert to fraction form
    208,897.40/313,346.10 = 103,921.40/x
  3. Step 3: Cross multiply
    208,897.40x = 313,346.10 × 103,921.40
  4. Step 4: Simplify right side
    208,897.40x = 32,563,365,396.54
  5. Step 5: Solve for x
    x = 32,563,365,396.54/208,897.40
  6. Step 6: Final answer
    x = 155,882.10

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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.