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Finding the Fourth Proportional to 623,421.32, 860,304.21 and 351,486.83

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Solution

The fourth proportional to 623,421.32, 860,304.21 and 351,486.83 is: 485,042.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    623,421.32 : 860,304.21 = 351,486.83 : x
  2. Step 2: Convert to fraction form
    623,421.32/860,304.21 = 351,486.83/x
  3. Step 3: Cross multiply
    623,421.32x = 860,304.21 × 351,486.83
  4. Step 4: Simplify right side
    623,421.32x = 302,385,599,608.55
  5. Step 5: Solve for x
    x = 302,385,599,608.55/623,421.32
  6. Step 6: Final answer
    x = 485,042.12

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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 (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.