Home / 1,585.83-2,378.75-431.58

Finding the Fourth Proportional to 1,585.83, 2,378.75 and 431.58

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Solution

The fourth proportional to 1,585.83, 2,378.75 and 431.58 is: 647.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,585.83 : 2,378.75 = 431.58 : x
  2. Step 2: Convert to fraction form
    1,585.83/2,378.75 = 431.58/x
  3. Step 3: Cross multiply
    1,585.83x = 2,378.75 × 431.58
  4. Step 4: Simplify right side
    1,585.83x = 1,026,618.77
  5. Step 5: Solve for x
    x = 1,026,618.77/1,585.83
  6. Step 6: Final answer
    x = 647.37

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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.