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Finding the Fourth Proportional to 651,915.80, 978,165.30 and 314,826.20

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Solution

The fourth proportional to 651,915.80, 978,165.30 and 314,826.20 is: 472,380.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    651,915.80 : 978,165.30 = 314,826.20 : x
  2. Step 2: Convert to fraction form
    651,915.80/978,165.30 = 314,826.20/x
  3. Step 3: Cross multiply
    651,915.80x = 978,165.30 × 314,826.20
  4. Step 4: Simplify right side
    651,915.80x = 307,952,064,370.86
  5. Step 5: Solve for x
    x = 307,952,064,370.86/651,915.80
  6. Step 6: Final answer
    x = 472,380.12

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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.