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Finding the Fourth Proportional to 665,982,006.40, 998,973,009.60 and 655,778,339.20

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Solution

The fourth proportional to 665,982,006.40, 998,973,009.60 and 655,778,339.20 is: 983,667,508.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,982,006.40 : 998,973,009.60 = 655,778,339.20 : x
  2. Step 2: Convert to fraction form
    665,982,006.40/998,973,009.60 = 655,778,339.20/x
  3. Step 3: Cross multiply
    665,982,006.40x = 998,973,009.60 × 655,778,339.20
  4. Step 4: Simplify right side
    665,982,006.40x = 655,104,861,141,113,728
  5. Step 5: Solve for x
    x = 655,104,861,141,113,728/665,982,006.40
  6. Step 6: Final answer
    x = 983,667,508.80

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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.