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Finding the Fourth Proportional to 647,820.58, 893,986.48 and 357,434.82

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Solution

The fourth proportional to 647,820.58, 893,986.48 and 357,434.82 is: 493,256.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,820.58 : 893,986.48 = 357,434.82 : x
  2. Step 2: Convert to fraction form
    647,820.58/893,986.48 = 357,434.82/x
  3. Step 3: Cross multiply
    647,820.58x = 893,986.48 × 357,434.82
  4. Step 4: Simplify right side
    647,820.58x = 319,541,899,710.71
  5. Step 5: Solve for x
    x = 319,541,899,710.71/647,820.58
  6. Step 6: Final answer
    x = 493,256.79

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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.