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Finding the Fourth Proportional to 611,705.80, 917,558.70 and 611,705.80

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Solution

The fourth proportional to 611,705.80, 917,558.70 and 611,705.80 is: 917,558.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,705.80 : 917,558.70 = 611,705.80 : x
  2. Step 2: Convert to fraction form
    611,705.80/917,558.70 = 611,705.80/x
  3. Step 3: Cross multiply
    611,705.80x = 917,558.70 × 611,705.80
  4. Step 4: Simplify right side
    611,705.80x = 561,275,978,630.46
  5. Step 5: Solve for x
    x = 561,275,978,630.46/611,705.80
  6. Step 6: Final answer
    x = 917,558.70

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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.