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Finding the Fourth Proportional to 2,570.91, 3,547.85 and 1,391.99

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Solution

The fourth proportional to 2,570.91, 3,547.85 and 1,391.99 is: 1,920.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,570.91 : 3,547.85 = 1,391.99 : x
  2. Step 2: Convert to fraction form
    2,570.91/3,547.85 = 1,391.99/x
  3. Step 3: Cross multiply
    2,570.91x = 3,547.85 × 1,391.99
  4. Step 4: Simplify right side
    2,570.91x = 4,938,547.02
  5. Step 5: Solve for x
    x = 4,938,547.02/2,570.91
  6. Step 6: Final answer
    x = 1,920.93

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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.