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Finding the Fourth Proportional to 654,671.40, 903,311.06 and 382,686.72

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Solution

The fourth proportional to 654,671.40, 903,311.06 and 382,686.72 is: 528,028.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    654,671.40 : 903,311.06 = 382,686.72 : x
  2. Step 2: Convert to fraction form
    654,671.40/903,311.06 = 382,686.72/x
  3. Step 3: Cross multiply
    654,671.40x = 903,311.06 × 382,686.72
  4. Step 4: Simplify right side
    654,671.40x = 345,685,146,691.12
  5. Step 5: Solve for x
    x = 345,685,146,691.12/654,671.40
  6. Step 6: Final answer
    x = 528,028.48

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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.