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Finding the Fourth Proportional to 455,421.70, 683,132.55 and 218,707.30

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Solution

The fourth proportional to 455,421.70, 683,132.55 and 218,707.30 is: 328,060.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,421.70 : 683,132.55 = 218,707.30 : x
  2. Step 2: Convert to fraction form
    455,421.70/683,132.55 = 218,707.30/x
  3. Step 3: Cross multiply
    455,421.70x = 683,132.55 × 218,707.30
  4. Step 4: Simplify right side
    455,421.70x = 149,406,075,552.62
  5. Step 5: Solve for x
    x = 149,406,075,552.62/455,421.70
  6. Step 6: Final answer
    x = 328,060.95

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Similar ratio
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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.