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Finding the Fourth Proportional to 647,677.96, 893,490.54 and 421,240.84

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Solution

The fourth proportional to 647,677.96, 893,490.54 and 421,240.84 is: 581,113.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,677.96 : 893,490.54 = 421,240.84 : x
  2. Step 2: Convert to fraction form
    647,677.96/893,490.54 = 421,240.84/x
  3. Step 3: Cross multiply
    647,677.96x = 893,490.54 × 421,240.84
  4. Step 4: Simplify right side
    647,677.96x = 376,374,705,601.65
  5. Step 5: Solve for x
    x = 376,374,705,601.65/647,677.96
  6. Step 6: Final answer
    x = 581,113.96

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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.