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Finding the Fourth Proportional to 219,215.70, 328,823.55 and 144,420.30

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Solution

The fourth proportional to 219,215.70, 328,823.55 and 144,420.30 is: 216,630.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,215.70 : 328,823.55 = 144,420.30 : x
  2. Step 2: Convert to fraction form
    219,215.70/328,823.55 = 144,420.30/x
  3. Step 3: Cross multiply
    219,215.70x = 328,823.55 × 144,420.30
  4. Step 4: Simplify right side
    219,215.70x = 47,488,795,738.07
  5. Step 5: Solve for x
    x = 47,488,795,738.07/219,215.70
  6. Step 6: Final answer
    x = 216,630.45

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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.