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Finding the Fourth Proportional to 647,750.40, 893,890.55 and 357,374.21

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Solution

The fourth proportional to 647,750.40, 893,890.55 and 357,374.21 is: 493,173.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,750.40 : 893,890.55 = 357,374.21 : x
  2. Step 2: Convert to fraction form
    647,750.40/893,890.55 = 357,374.21/x
  3. Step 3: Cross multiply
    647,750.40x = 893,890.55 × 357,374.21
  4. Step 4: Simplify right side
    647,750.40x = 319,453,427,345.85
  5. Step 5: Solve for x
    x = 319,453,427,345.85/647,750.40
  6. Step 6: Final answer
    x = 493,173.65

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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.