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Finding the Fourth Proportional to 212,814,458.48, 319,221,687.72 and 212,814,458.48

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Solution

The fourth proportional to 212,814,458.48, 319,221,687.72 and 212,814,458.48 is: 319,221,687.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,814,458.48 : 319,221,687.72 = 212,814,458.48 : x
  2. Step 2: Convert to fraction form
    212,814,458.48/319,221,687.72 = 212,814,458.48/x
  3. Step 3: Cross multiply
    212,814,458.48x = 319,221,687.72 × 212,814,458.48
  4. Step 4: Simplify right side
    212,814,458.48x = 67,934,990,605,607,360
  5. Step 5: Solve for x
    x = 67,934,990,605,607,360/212,814,458.48
  6. Step 6: Final answer
    x = 319,221,687.72

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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.