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Finding the Fourth Proportional to 665,846.33, 918,485.93 and 379,312.88

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Solution

The fourth proportional to 665,846.33, 918,485.93 and 379,312.88 is: 523,234.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,846.33 : 918,485.93 = 379,312.88 : x
  2. Step 2: Convert to fraction form
    665,846.33/918,485.93 = 379,312.88/x
  3. Step 3: Cross multiply
    665,846.33x = 918,485.93 × 379,312.88
  4. Step 4: Simplify right side
    665,846.33x = 348,393,539,703.63
  5. Step 5: Solve for x
    x = 348,393,539,703.63/665,846.33
  6. Step 6: Final answer
    x = 523,234.16

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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.