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Finding the Fourth Proportional to 219,215.40, 328,823.10 and 212,654.40

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Solution

The fourth proportional to 219,215.40, 328,823.10 and 212,654.40 is: 318,981.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,215.40 : 328,823.10 = 212,654.40 : x
  2. Step 2: Convert to fraction form
    219,215.40/328,823.10 = 212,654.40/x
  3. Step 3: Cross multiply
    219,215.40x = 328,823.10 × 212,654.40
  4. Step 4: Simplify right side
    219,215.40x = 69,925,679,036.64
  5. Step 5: Solve for x
    x = 69,925,679,036.64/219,215.40
  6. Step 6: Final answer
    x = 318,981.60

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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.