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Finding the Fourth Proportional to 455,403.40, 683,105.10 and 442,281.40

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Solution

The fourth proportional to 455,403.40, 683,105.10 and 442,281.40 is: 663,422.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,403.40 : 683,105.10 = 442,281.40 : x
  2. Step 2: Convert to fraction form
    455,403.40/683,105.10 = 442,281.40/x
  3. Step 3: Cross multiply
    455,403.40x = 683,105.10 × 442,281.40
  4. Step 4: Simplify right side
    455,403.40x = 302,124,679,975.14
  5. Step 5: Solve for x
    x = 302,124,679,975.14/455,403.40
  6. Step 6: Final answer
    x = 663,422.10

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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.