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Finding the Fourth Proportional to 612,755.10, 845,581.74 and 340,815.30

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Solution

The fourth proportional to 612,755.10, 845,581.74 and 340,815.30 is: 470,313.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,755.10 : 845,581.74 = 340,815.30 : x
  2. Step 2: Convert to fraction form
    612,755.10/845,581.74 = 340,815.30/x
  3. Step 3: Cross multiply
    612,755.10x = 845,581.74 × 340,815.30
  4. Step 4: Simplify right side
    612,755.10x = 288,187,194,392.62
  5. Step 5: Solve for x
    x = 288,187,194,392.62/612,755.10
  6. Step 6: Final answer
    x = 470,313.82

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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.