Home / 401,790.90-602,686.38-313,110.78

Finding the Fourth Proportional to 401,790.90, 602,686.38 and 313,110.78

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Solution

The fourth proportional to 401,790.90, 602,686.38 and 313,110.78 is: 469,666.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    401,790.90 : 602,686.38 = 313,110.78 : x
  2. Step 2: Convert to fraction form
    401,790.90/602,686.38 = 313,110.78/x
  3. Step 3: Cross multiply
    401,790.90x = 602,686.38 × 313,110.78
  4. Step 4: Simplify right side
    401,790.90x = 188,707,602,537.18
  5. Step 5: Solve for x
    x = 188,707,602,537.18/401,790.90
  6. Step 6: Final answer
    x = 469,666.19

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.