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Finding the Fourth Proportional to 612,389.15, 845,049.17 and 340,440.48

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Solution

The fourth proportional to 612,389.15, 845,049.17 and 340,440.48 is: 469,781.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,389.15 : 845,049.17 = 340,440.48 : x
  2. Step 2: Convert to fraction form
    612,389.15/845,049.17 = 340,440.48/x
  3. Step 3: Cross multiply
    612,389.15x = 845,049.17 × 340,440.48
  4. Step 4: Simplify right side
    612,389.15x = 287,688,943,356.20
  5. Step 5: Solve for x
    x = 287,688,943,356.20/612,389.15
  6. Step 6: Final answer
    x = 469,781.26

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1.5x scale

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.