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Finding the Fourth Proportional to 655,788.18, 904,989.72 and 380,199.72

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Solution

The fourth proportional to 655,788.18, 904,989.72 and 380,199.72 is: 524,676.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    655,788.18 : 904,989.72 = 380,199.72 : x
  2. Step 2: Convert to fraction form
    655,788.18/904,989.72 = 380,199.72/x
  3. Step 3: Cross multiply
    655,788.18x = 904,989.72 × 380,199.72
  4. Step 4: Simplify right side
    655,788.18x = 344,076,838,146.88
  5. Step 5: Solve for x
    x = 344,076,838,146.88/655,788.18
  6. Step 6: Final answer
    x = 524,676.79

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1.5x scale

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.