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Finding the Fourth Proportional to 612,717.95, 845,491.55 and 354,543.41

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Solution

The fourth proportional to 612,717.95, 845,491.55 and 354,543.41 is: 489,235.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,717.95 : 845,491.55 = 354,543.41 : x
  2. Step 2: Convert to fraction form
    612,717.95/845,491.55 = 354,543.41/x
  3. Step 3: Cross multiply
    612,717.95x = 845,491.55 × 354,543.41
  4. Step 4: Simplify right side
    612,717.95x = 299,763,457,604.20
  5. Step 5: Solve for x
    x = 299,763,457,604.20/612,717.95
  6. Step 6: Final answer
    x = 489,235.64

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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.