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Finding the Fourth Proportional to 561,421.22, 775,580.88 and 485,838.50

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Solution

The fourth proportional to 561,421.22, 775,580.88 and 485,838.50 is: 671,166.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,421.22 : 775,580.88 = 485,838.50 : x
  2. Step 2: Convert to fraction form
    561,421.22/775,580.88 = 485,838.50/x
  3. Step 3: Cross multiply
    561,421.22x = 775,580.88 × 485,838.50
  4. Step 4: Simplify right side
    561,421.22x = 376,807,051,367.88
  5. Step 5: Solve for x
    x = 376,807,051,367.88/561,421.22
  6. Step 6: Final answer
    x = 671,166.39

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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.