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Finding the Fourth Proportional to 1,121,368, 1,682,751.84 and 456,520

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Solution

The fourth proportional to 1,121,368, 1,682,751.84 and 456,520 is: 685,064.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,121,368 : 1,682,751.84 = 456,520 : x
  2. Step 2: Convert to fraction form
    1,121,368/1,682,751.84 = 456,520/x
  3. Step 3: Cross multiply
    1,121,368x = 1,682,751.84 × 456,520
  4. Step 4: Simplify right side
    1,121,368x = 768,209,869,996.80
  5. Step 5: Solve for x
    x = 768,209,869,996.80/1,121,368
  6. Step 6: Final answer
    x = 685,064.91

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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.