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Finding the Fourth Proportional to 665,878.16, 918,915.76 and 364,072.16

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Solution

The fourth proportional to 665,878.16, 918,915.76 and 364,072.16 is: 502,421.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,878.16 : 918,915.76 = 364,072.16 : x
  2. Step 2: Convert to fraction form
    665,878.16/918,915.76 = 364,072.16/x
  3. Step 3: Cross multiply
    665,878.16x = 918,915.76 × 364,072.16
  4. Step 4: Simplify right side
    665,878.16x = 334,551,645,601.24
  5. Step 5: Solve for x
    x = 334,551,645,601.24/665,878.16
  6. Step 6: Final answer
    x = 502,421.71

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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.