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Finding the Fourth Proportional to 648,930.51, 895,542.15 and 358,560.78

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Solution

The fourth proportional to 648,930.51, 895,542.15 and 358,560.78 is: 494,823.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    648,930.51 : 895,542.15 = 358,560.78 : x
  2. Step 2: Convert to fraction form
    648,930.51/895,542.15 = 358,560.78/x
  3. Step 3: Cross multiply
    648,930.51x = 895,542.15 × 358,560.78
  4. Step 4: Simplify right side
    648,930.51x = 321,106,288,804.75
  5. Step 5: Solve for x
    x = 321,106,288,804.75/648,930.51
  6. Step 6: Final answer
    x = 494,823.85

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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.