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Finding the Fourth Proportional to 219,220.60, 328,830.90 and 171,981.40

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Solution

The fourth proportional to 219,220.60, 328,830.90 and 171,981.40 is: 257,972.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,220.60 : 328,830.90 = 171,981.40 : x
  2. Step 2: Convert to fraction form
    219,220.60/328,830.90 = 171,981.40/x
  3. Step 3: Cross multiply
    219,220.60x = 328,830.90 × 171,981.40
  4. Step 4: Simplify right side
    219,220.60x = 56,552,798,545.26
  5. Step 5: Solve for x
    x = 56,552,798,545.26/219,220.60
  6. Step 6: Final answer
    x = 257,972.10

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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.