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Finding the Fourth Proportional to 386,157,138.90, 579,235,708.35 and 386,157,138.90

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Solution

The fourth proportional to 386,157,138.90, 579,235,708.35 and 386,157,138.90 is: 579,235,708.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,157,138.90 : 579,235,708.35 = 386,157,138.90 : x
  2. Step 2: Convert to fraction form
    386,157,138.90/579,235,708.35 = 386,157,138.90/x
  3. Step 3: Cross multiply
    386,157,138.90x = 579,235,708.35 × 386,157,138.90
  4. Step 4: Simplify right side
    386,157,138.90x = 223,676,003,885,150,848
  5. Step 5: Solve for x
    x = 223,676,003,885,150,848/386,157,138.90
  6. Step 6: Final answer
    x = 579,235,708.35

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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.