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Finding the Fourth Proportional to 219,000.40, 328,630.20 and 144,336.40

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Solution

The fourth proportional to 219,000.40, 328,630.20 and 144,336.40 is: 216,590.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,000.40 : 328,630.20 = 144,336.40 : x
  2. Step 2: Convert to fraction form
    219,000.40/328,630.20 = 144,336.40/x
  3. Step 3: Cross multiply
    219,000.40x = 328,630.20 × 144,336.40
  4. Step 4: Simplify right side
    219,000.40x = 47,433,299,999.28
  5. Step 5: Solve for x
    x = 47,433,299,999.28/219,000.40
  6. Step 6: Final answer
    x = 216,590.02

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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.