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Finding the Fourth Proportional to 1,376.69, 1,898.40 and 957.51

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Solution

The fourth proportional to 1,376.69, 1,898.40 and 957.51 is: 1,320.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,376.69 : 1,898.40 = 957.51 : x
  2. Step 2: Convert to fraction form
    1,376.69/1,898.40 = 957.51/x
  3. Step 3: Cross multiply
    1,376.69x = 1,898.40 × 957.51
  4. Step 4: Simplify right side
    1,376.69x = 1,817,740.57
  5. Step 5: Solve for x
    x = 1,817,740.57/1,376.69
  6. Step 6: Final answer
    x = 1,320.38

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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.