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Finding the Fourth Proportional to 665,878.50, 918,912.33 and 364,072.50

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Solution

The fourth proportional to 665,878.50, 918,912.33 and 364,072.50 is: 502,420.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,878.50 : 918,912.33 = 364,072.50 : x
  2. Step 2: Convert to fraction form
    665,878.50/918,912.33 = 364,072.50/x
  3. Step 3: Cross multiply
    665,878.50x = 918,912.33 × 364,072.50
  4. Step 4: Simplify right side
    665,878.50x = 334,550,709,263.93
  5. Step 5: Solve for x
    x = 334,550,709,263.93/665,878.50
  6. Step 6: Final answer
    x = 502,420.05

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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.