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Finding the Fourth Proportional to 623,808.28, 860,836 and 351,872.20

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Solution

The fourth proportional to 623,808.28, 860,836 and 351,872.20 is: 485,572.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    623,808.28 : 860,836 = 351,872.20 : x
  2. Step 2: Convert to fraction form
    623,808.28/860,836 = 351,872.20/x
  3. Step 3: Cross multiply
    623,808.28x = 860,836 × 351,872.20
  4. Step 4: Simplify right side
    623,808.28x = 302,904,257,159.20
  5. Step 5: Solve for x
    x = 302,904,257,159.20/623,808.28
  6. Step 6: Final answer
    x = 485,572.68

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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.