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Finding the Fourth Proportional to 652,640,003.40, 978,960,005.10 and 221,818,499.40

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Solution

The fourth proportional to 652,640,003.40, 978,960,005.10 and 221,818,499.40 is: 332,727,749.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    652,640,003.40 : 978,960,005.10 = 221,818,499.40 : x
  2. Step 2: Convert to fraction form
    652,640,003.40/978,960,005.10 = 221,818,499.40/x
  3. Step 3: Cross multiply
    652,640,003.40x = 978,960,005.10 × 221,818,499.40
  4. Step 4: Simplify right side
    652,640,003.40x = 217,151,439,303,898,368
  5. Step 5: Solve for x
    x = 217,151,439,303,898,368/652,640,003.40
  6. Step 6: Final answer
    x = 332,727,749.10

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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.