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Finding the Fourth Proportional to 455,725.20, 683,587.80 and 448,726.80

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Solution

The fourth proportional to 455,725.20, 683,587.80 and 448,726.80 is: 673,090.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,725.20 : 683,587.80 = 448,726.80 : x
  2. Step 2: Convert to fraction form
    455,725.20/683,587.80 = 448,726.80/x
  3. Step 3: Cross multiply
    455,725.20x = 683,587.80 × 448,726.80
  4. Step 4: Simplify right side
    455,725.20x = 306,744,166,013.04
  5. Step 5: Solve for x
    x = 306,744,166,013.04/455,725.20
  6. Step 6: Final answer
    x = 673,090.20

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.