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Finding the Fourth Proportional to 612,355.48, 845,079.41 and 340,427.91

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Solution

The fourth proportional to 612,355.48, 845,079.41 and 340,427.91 is: 469,806.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,355.48 : 845,079.41 = 340,427.91 : x
  2. Step 2: Convert to fraction form
    612,355.48/845,079.41 = 340,427.91/x
  3. Step 3: Cross multiply
    612,355.48x = 845,079.41 × 340,427.91
  4. Step 4: Simplify right side
    612,355.48x = 287,688,617,330.33
  5. Step 5: Solve for x
    x = 287,688,617,330.33/612,355.48
  6. Step 6: Final answer
    x = 469,806.55

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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.