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Finding the Fourth Proportional to 655,782.15, 904,981.41 and 380,193.72

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Solution

The fourth proportional to 655,782.15, 904,981.41 and 380,193.72 is: 524,668.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    655,782.15 : 904,981.41 = 380,193.72 : x
  2. Step 2: Convert to fraction form
    655,782.15/904,981.41 = 380,193.72/x
  3. Step 3: Cross multiply
    655,782.15x = 904,981.41 × 380,193.72
  4. Step 4: Simplify right side
    655,782.15x = 344,068,248,798.75
  5. Step 5: Solve for x
    x = 344,068,248,798.75/655,782.15
  6. Step 6: Final answer
    x = 524,668.52

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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.