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Finding the Fourth Proportional to 449,744.61, 620,587.59 and 288,817.63

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Solution

The fourth proportional to 449,744.61, 620,587.59 and 288,817.63 is: 398,529.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    449,744.61 : 620,587.59 = 288,817.63 : x
  2. Step 2: Convert to fraction form
    449,744.61/620,587.59 = 288,817.63/x
  3. Step 3: Cross multiply
    449,744.61x = 620,587.59 × 288,817.63
  4. Step 4: Simplify right side
    449,744.61x = 179,236,638,502.68
  5. Step 5: Solve for x
    x = 179,236,638,502.68/449,744.61
  6. Step 6: Final answer
    x = 398,529.82

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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.