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Finding the Fourth Proportional to 455,416.90, 683,125.35 and 442,294.90

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Solution

The fourth proportional to 455,416.90, 683,125.35 and 442,294.90 is: 663,442.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,416.90 : 683,125.35 = 442,294.90 : x
  2. Step 2: Convert to fraction form
    455,416.90/683,125.35 = 442,294.90/x
  3. Step 3: Cross multiply
    455,416.90x = 683,125.35 × 442,294.90
  4. Step 4: Simplify right side
    455,416.90x = 302,142,858,365.72
  5. Step 5: Solve for x
    x = 302,142,858,365.72/455,416.90
  6. Step 6: Final answer
    x = 663,442.35

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Double scale
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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.