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Finding the Fourth Proportional to 665,840.32, 918,600.96 and 424,079.44

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Solution

The fourth proportional to 665,840.32, 918,600.96 and 424,079.44 is: 585,064.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,840.32 : 918,600.96 = 424,079.44 : x
  2. Step 2: Convert to fraction form
    665,840.32/918,600.96 = 424,079.44/x
  3. Step 3: Cross multiply
    665,840.32x = 918,600.96 × 424,079.44
  4. Step 4: Simplify right side
    665,840.32x = 389,559,780,700.26
  5. Step 5: Solve for x
    x = 389,559,780,700.26/665,840.32
  6. Step 6: Final answer
    x = 585,064.87

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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.