Home / 1,585.39-2,187.70-947.31

Finding the Fourth Proportional to 1,585.39, 2,187.70 and 947.31

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Solution

The fourth proportional to 1,585.39, 2,187.70 and 947.31 is: 1,307.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,585.39 : 2,187.70 = 947.31 : x
  2. Step 2: Convert to fraction form
    1,585.39/2,187.70 = 947.31/x
  3. Step 3: Cross multiply
    1,585.39x = 2,187.70 × 947.31
  4. Step 4: Simplify right side
    1,585.39x = 2,072,430.09
  5. Step 5: Solve for x
    x = 2,072,430.09/1,585.39
  6. Step 6: Final answer
    x = 1,307.21

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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.