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Finding the Fourth Proportional to 1,319,164,043.20, 1,978,604,347.20 and 349,815,659.20

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Solution

The fourth proportional to 1,319,164,043.20, 1,978,604,347.20 and 349,815,659.20 is: 524,685,908.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,319,164,043.20 : 1,978,604,347.20 = 349,815,659.20 : x
  2. Step 2: Convert to fraction form
    1,319,164,043.20/1,978,604,347.20 = 349,815,659.20/x
  3. Step 3: Cross multiply
    1,319,164,043.20x = 1,978,604,347.20 × 349,815,659.20
  4. Step 4: Simplify right side
    1,319,164,043.20x = 692,146,784,011,753,728
  5. Step 5: Solve for x
    x = 692,146,784,011,753,728/1,319,164,043.20
  6. Step 6: Final answer
    x = 524,685,908.15

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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.