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Finding the Fourth Proportional to 612,718.14, 845,491.80 and 354,543.60

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Solution

The fourth proportional to 612,718.14, 845,491.80 and 354,543.60 is: 489,235.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,718.14 : 845,491.80 = 354,543.60 : x
  2. Step 2: Convert to fraction form
    612,718.14/845,491.80 = 354,543.60/x
  3. Step 3: Cross multiply
    612,718.14x = 845,491.80 × 354,543.60
  4. Step 4: Simplify right side
    612,718.14x = 299,763,706,542.48
  5. Step 5: Solve for x
    x = 299,763,706,542.48/612,718.14
  6. Step 6: Final answer
    x = 489,235.89

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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.