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Finding the Fourth Proportional to 208,885.40, 313,328.10 and 103,909.40

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Solution

The fourth proportional to 208,885.40, 313,328.10 and 103,909.40 is: 155,864.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,885.40 : 313,328.10 = 103,909.40 : x
  2. Step 2: Convert to fraction form
    208,885.40/313,328.10 = 103,909.40/x
  3. Step 3: Cross multiply
    208,885.40x = 313,328.10 × 103,909.40
  4. Step 4: Simplify right side
    208,885.40x = 32,557,734,874.14
  5. Step 5: Solve for x
    x = 32,557,734,874.14/208,885.40
  6. Step 6: Final answer
    x = 155,864.10

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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.