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Finding the Fourth Proportional to 611,771.70, 917,657.55 and 422,814.90

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Solution

The fourth proportional to 611,771.70, 917,657.55 and 422,814.90 is: 634,222.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,771.70 : 917,657.55 = 422,814.90 : x
  2. Step 2: Convert to fraction form
    611,771.70/917,657.55 = 422,814.90/x
  3. Step 3: Cross multiply
    611,771.70x = 917,657.55 × 422,814.90
  4. Step 4: Simplify right side
    611,771.70x = 387,999,285,237.50
  5. Step 5: Solve for x
    x = 387,999,285,237.50/611,771.70
  6. Step 6: Final answer
    x = 634,222.35

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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.