Home / 691,482,949.12-954,253,871.76-378,210,464.38

Finding the Fourth Proportional to 691,482,949.12, 954,253,871.76 and 378,210,464.38

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Solution

The fourth proportional to 691,482,949.12, 954,253,871.76 and 378,210,464.38 is: 521,934,489.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    691,482,949.12 : 954,253,871.76 = 378,210,464.38 : x
  2. Step 2: Convert to fraction form
    691,482,949.12/954,253,871.76 = 378,210,464.38/x
  3. Step 3: Cross multiply
    691,482,949.12x = 954,253,871.76 × 378,210,464.38
  4. Step 4: Simplify right side
    691,482,949.12x = 360,908,799,974,762,560
  5. Step 5: Solve for x
    x = 360,908,799,974,762,560/691,482,949.12
  6. Step 6: Final answer
    x = 521,934,489.40

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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.