Home / 1,678.40-2,316.16-1,015.10

Finding the Fourth Proportional to 1,678.40, 2,316.16 and 1,015.10

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Solution

The fourth proportional to 1,678.40, 2,316.16 and 1,015.10 is: 1,400.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,678.40 : 2,316.16 = 1,015.10 : x
  2. Step 2: Convert to fraction form
    1,678.40/2,316.16 = 1,015.10/x
  3. Step 3: Cross multiply
    1,678.40x = 2,316.16 × 1,015.10
  4. Step 4: Simplify right side
    1,678.40x = 2,351,134.02
  5. Step 5: Solve for x
    x = 2,351,134.02/1,678.40
  6. Step 6: Final answer
    x = 1,400.82

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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.