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Finding the Fourth Proportional to 1,547.10, 2,133.81 and 957.15

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Solution

The fourth proportional to 1,547.10, 2,133.81 and 957.15 is: 1,320.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,547.10 : 2,133.81 = 957.15 : x
  2. Step 2: Convert to fraction form
    1,547.10/2,133.81 = 957.15/x
  3. Step 3: Cross multiply
    1,547.10x = 2,133.81 × 957.15
  4. Step 4: Simplify right side
    1,547.10x = 2,042,376.24
  5. Step 5: Solve for x
    x = 2,042,376.24/1,547.10
  6. Step 6: Final answer
    x = 1,320.13

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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.