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Finding the Fourth Proportional to 219,040.40, 307,486 and 219,040.40

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Solution

The fourth proportional to 219,040.40, 307,486 and 219,040.40 is: 307,486

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,040.40 : 307,486 = 219,040.40 : x
  2. Step 2: Convert to fraction form
    219,040.40/307,486 = 219,040.40/x
  3. Step 3: Cross multiply
    219,040.40x = 307,486 × 219,040.40
  4. Step 4: Simplify right side
    219,040.40x = 67,351,856,434.40
  5. Step 5: Solve for x
    x = 67,351,856,434.40/219,040.40
  6. Step 6: Final answer
    x = 307,486

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.