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Finding the Fourth Proportional to 612,651.89, 845,410.61 and 340,720.31

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Solution

The fourth proportional to 612,651.89, 845,410.61 and 340,720.31 is: 470,166.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,651.89 : 845,410.61 = 340,720.31 : x
  2. Step 2: Convert to fraction form
    612,651.89/845,410.61 = 340,720.31/x
  3. Step 3: Cross multiply
    612,651.89x = 845,410.61 × 340,720.31
  4. Step 4: Simplify right side
    612,651.89x = 288,048,559,185.84
  5. Step 5: Solve for x
    x = 288,048,559,185.84/612,651.89
  6. Step 6: Final answer
    x = 470,166.77

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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.