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Finding the Fourth Proportional to 666,187.40, 919,638.84 and 424,794.44

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Solution

The fourth proportional to 666,187.40, 919,638.84 and 424,794.44 is: 586,407.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,187.40 : 919,638.84 = 424,794.44 : x
  2. Step 2: Convert to fraction form
    666,187.40/919,638.84 = 424,794.44/x
  3. Step 3: Cross multiply
    666,187.40x = 919,638.84 × 424,794.44
  4. Step 4: Simplify right side
    666,187.40x = 390,657,466,040.05
  5. Step 5: Solve for x
    x = 390,657,466,040.05/666,187.40
  6. Step 6: Final answer
    x = 586,407.77

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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.