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Finding the Fourth Proportional to 212,909,363.60, 319,364,045.40 and 191,368,288.40

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Solution

The fourth proportional to 212,909,363.60, 319,364,045.40 and 191,368,288.40 is: 287,052,432.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,909,363.60 : 319,364,045.40 = 191,368,288.40 : x
  2. Step 2: Convert to fraction form
    212,909,363.60/319,364,045.40 = 191,368,288.40/x
  3. Step 3: Cross multiply
    212,909,363.60x = 319,364,045.40 × 191,368,288.40
  4. Step 4: Simplify right side
    212,909,363.60x = 61,116,150,744,697,888
  5. Step 5: Solve for x
    x = 61,116,150,744,697,888/212,909,363.60
  6. Step 6: Final answer
    x = 287,052,432.60

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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.