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Finding the Fourth Proportional to 309,566.04, 427,206 and 173,630.20

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Solution

The fourth proportional to 309,566.04, 427,206 and 173,630.20 is: 239,612.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,566.04 : 427,206 = 173,630.20 : x
  2. Step 2: Convert to fraction form
    309,566.04/427,206 = 173,630.20/x
  3. Step 3: Cross multiply
    309,566.04x = 427,206 × 173,630.20
  4. Step 4: Simplify right side
    309,566.04x = 74,175,863,221.20
  5. Step 5: Solve for x
    x = 74,175,863,221.20/309,566.04
  6. Step 6: Final answer
    x = 239,612.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.