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Finding the Fourth Proportional to 689,574,612, 951,633,177.60 and 376,328,966.88

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Solution

The fourth proportional to 689,574,612, 951,633,177.60 and 376,328,966.88 is: 519,345,005.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    689,574,612 : 951,633,177.60 = 376,328,966.88 : x
  2. Step 2: Convert to fraction form
    689,574,612/951,633,177.60 = 376,328,966.88/x
  3. Step 3: Cross multiply
    689,574,612x = 951,633,177.60 × 376,328,966.88
  4. Step 4: Simplify right side
    689,574,612x = 358,127,130,574,939,584
  5. Step 5: Solve for x
    x = 358,127,130,574,939,584/689,574,612
  6. Step 6: Final answer
    x = 519,345,005.37

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.