Home / 1,561.17-2,154.15-898.05

Finding the Fourth Proportional to 1,561.17, 2,154.15 and 898.05

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Solution

The fourth proportional to 1,561.17, 2,154.15 and 898.05 is: 1,239.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,561.17 : 2,154.15 = 898.05 : x
  2. Step 2: Convert to fraction form
    1,561.17/2,154.15 = 898.05/x
  3. Step 3: Cross multiply
    1,561.17x = 2,154.15 × 898.05
  4. Step 4: Simplify right side
    1,561.17x = 1,934,534.41
  5. Step 5: Solve for x
    x = 1,934,534.41/1,561.17
  6. Step 6: Final answer
    x = 1,239.16

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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.