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Finding the Fourth Proportional to 208,606.35, 312,909.53 and 103,630.35

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Solution

The fourth proportional to 208,606.35, 312,909.53 and 103,630.35 is: 155,445.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,606.35 : 312,909.53 = 103,630.35 : x
  2. Step 2: Convert to fraction form
    208,606.35/312,909.53 = 103,630.35/x
  3. Step 3: Cross multiply
    208,606.35x = 312,909.53 × 103,630.35
  4. Step 4: Simplify right side
    208,606.35x = 32,426,924,112.24
  5. Step 5: Solve for x
    x = 32,426,924,112.24/208,606.35
  6. Step 6: Final answer
    x = 155,445.53

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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.