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Finding the Fourth Proportional to 212,872,604.70, 319,308,907.05 and 212,872,604.70

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Solution

The fourth proportional to 212,872,604.70, 319,308,907.05 and 212,872,604.70 is: 319,308,907.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,872,604.70 : 319,308,907.05 = 212,872,604.70 : x
  2. Step 2: Convert to fraction form
    212,872,604.70/319,308,907.05 = 212,872,604.70/x
  3. Step 3: Cross multiply
    212,872,604.70x = 319,308,907.05 × 212,872,604.70
  4. Step 4: Simplify right side
    212,872,604.70x = 67,972,118,747,643,688
  5. Step 5: Solve for x
    x = 67,972,118,747,643,688/212,872,604.70
  6. Step 6: Final answer
    x = 319,308,907.05

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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.