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Finding the Fourth Proportional to 647,820.72, 893,600.64 and 418,018.32

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Solution

The fourth proportional to 647,820.72, 893,600.64 and 418,018.32 is: 576,612.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,820.72 : 893,600.64 = 418,018.32 : x
  2. Step 2: Convert to fraction form
    647,820.72/893,600.64 = 418,018.32/x
  3. Step 3: Cross multiply
    647,820.72x = 893,600.64 × 418,018.32
  4. Step 4: Simplify right side
    647,820.72x = 373,541,438,283.73
  5. Step 5: Solve for x
    x = 373,541,438,283.73/647,820.72
  6. Step 6: Final answer
    x = 576,612.37

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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.