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Finding the Fourth Proportional to 3,612.79, 5,386.81 and 3,547.18

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Solution

The fourth proportional to 3,612.79, 5,386.81 and 3,547.18 is: 5,288.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,612.79 : 5,386.81 = 3,547.18 : x
  2. Step 2: Convert to fraction form
    3,612.79/5,386.81 = 3,547.18/x
  3. Step 3: Cross multiply
    3,612.79x = 5,386.81 × 3,547.18
  4. Step 4: Simplify right side
    3,612.79x = 19,107,984.70
  5. Step 5: Solve for x
    x = 19,107,984.70/3,612.79
  6. Step 6: Final answer
    x = 5,288.98

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.