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Finding the Fourth Proportional to 612,389.16, 845,049.16 and 340,440.50

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Solution

The fourth proportional to 612,389.16, 845,049.16 and 340,440.50 is: 469,781.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,389.16 : 845,049.16 = 340,440.50 : x
  2. Step 2: Convert to fraction form
    612,389.16/845,049.16 = 340,440.50/x
  3. Step 3: Cross multiply
    612,389.16x = 845,049.16 × 340,440.50
  4. Step 4: Simplify right side
    612,389.16x = 287,688,958,554.98
  5. Step 5: Solve for x
    x = 287,688,958,554.98/612,389.16
  6. Step 6: Final answer
    x = 469,781.27

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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.