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Finding the Fourth Proportional to 455,220.45, 636,127.65 and 455,220.45

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Solution

The fourth proportional to 455,220.45, 636,127.65 and 455,220.45 is: 636,127.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,220.45 : 636,127.65 = 455,220.45 : x
  2. Step 2: Convert to fraction form
    455,220.45/636,127.65 = 455,220.45/x
  3. Step 3: Cross multiply
    455,220.45x = 636,127.65 × 455,220.45
  4. Step 4: Simplify right side
    455,220.45x = 289,578,315,090.44
  5. Step 5: Solve for x
    x = 289,578,315,090.44/455,220.45
  6. Step 6: Final answer
    x = 636,127.65

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.