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Finding the Fourth Proportional to 691,482,962.75, 954,253,890.59 and 378,210,478.01

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Solution

The fourth proportional to 691,482,962.75, 954,253,890.59 and 378,210,478.01 is: 521,934,508.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    691,482,962.75 : 954,253,890.59 = 378,210,478.01 : x
  2. Step 2: Convert to fraction form
    691,482,962.75/954,253,890.59 = 378,210,478.01/x
  3. Step 3: Cross multiply
    691,482,962.75x = 954,253,890.59 × 378,210,478.01
  4. Step 4: Simplify right side
    691,482,962.75x = 360,908,820,096,283,840
  5. Step 5: Solve for x
    x = 360,908,820,096,283,840/691,482,962.75
  6. Step 6: Final answer
    x = 521,934,508.21

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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.