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Finding the Fourth Proportional to 212,575,390.40, 318,296,215.20 and 212,575,390.40

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Solution

The fourth proportional to 212,575,390.40, 318,296,215.20 and 212,575,390.40 is: 318,296,215.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,575,390.40 : 318,296,215.20 = 212,575,390.40 : x
  2. Step 2: Convert to fraction form
    212,575,390.40/318,296,215.20 = 212,575,390.40/x
  3. Step 3: Cross multiply
    212,575,390.40x = 318,296,215.20 × 212,575,390.40
  4. Step 4: Simplify right side
    212,575,390.40x = 67,661,942,208,982,416
  5. Step 5: Solve for x
    x = 67,661,942,208,982,416/212,575,390.40
  6. Step 6: Final answer
    x = 318,296,215.20

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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.