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Finding the Fourth Proportional to 623,744.40, 860,999.52 and 485,649.12

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Solution

The fourth proportional to 623,744.40, 860,999.52 and 485,649.12 is: 670,376.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    623,744.40 : 860,999.52 = 485,649.12 : x
  2. Step 2: Convert to fraction form
    623,744.40/860,999.52 = 485,649.12/x
  3. Step 3: Cross multiply
    623,744.40x = 860,999.52 × 485,649.12
  4. Step 4: Simplify right side
    623,744.40x = 418,143,659,208.42
  5. Step 5: Solve for x
    x = 418,143,659,208.42/623,744.40
  6. Step 6: Final answer
    x = 670,376.61

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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.