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Finding the Fourth Proportional to 648,421.71, 895,012.01 and 376,611.78

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Solution

The fourth proportional to 648,421.71, 895,012.01 and 376,611.78 is: 519,834.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    648,421.71 : 895,012.01 = 376,611.78 : x
  2. Step 2: Convert to fraction form
    648,421.71/895,012.01 = 376,611.78/x
  3. Step 3: Cross multiply
    648,421.71x = 895,012.01 × 376,611.78
  4. Step 4: Simplify right side
    648,421.71x = 337,072,064,324.42
  5. Step 5: Solve for x
    x = 337,072,064,324.42/648,421.71
  6. Step 6: Final answer
    x = 519,834.64

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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.