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Finding the Fourth Proportional to 219,801.70, 329,702.55 and 145,006.30

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Solution

The fourth proportional to 219,801.70, 329,702.55 and 145,006.30 is: 217,509.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,801.70 : 329,702.55 = 145,006.30 : x
  2. Step 2: Convert to fraction form
    219,801.70/329,702.55 = 145,006.30/x
  3. Step 3: Cross multiply
    219,801.70x = 329,702.55 × 145,006.30
  4. Step 4: Simplify right side
    219,801.70x = 47,808,946,876.07
  5. Step 5: Solve for x
    x = 47,808,946,876.07/219,801.70
  6. Step 6: Final answer
    x = 217,509.45

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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.