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Finding the Fourth Proportional to 455,628.30, 683,442.45 and 287,666.70

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Solution

The fourth proportional to 455,628.30, 683,442.45 and 287,666.70 is: 431,500.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,628.30 : 683,442.45 = 287,666.70 : x
  2. Step 2: Convert to fraction form
    455,628.30/683,442.45 = 287,666.70/x
  3. Step 3: Cross multiply
    455,628.30x = 683,442.45 × 287,666.70
  4. Step 4: Simplify right side
    455,628.30x = 196,603,634,231.42
  5. Step 5: Solve for x
    x = 196,603,634,231.42/455,628.30
  6. Step 6: Final answer
    x = 431,500.05

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Similar ratio
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1.5x scale

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.