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Finding the Fourth Proportional to 646,245.81, 891,790.44 and 370,405.93

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Solution

The fourth proportional to 646,245.81, 891,790.44 and 370,405.93 is: 511,143.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    646,245.81 : 891,790.44 = 370,405.93 : x
  2. Step 2: Convert to fraction form
    646,245.81/891,790.44 = 370,405.93/x
  3. Step 3: Cross multiply
    646,245.81x = 891,790.44 × 370,405.93
  4. Step 4: Simplify right side
    646,245.81x = 330,324,461,908.34
  5. Step 5: Solve for x
    x = 330,324,461,908.34/646,245.81
  6. Step 6: Final answer
    x = 511,143.68

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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.