Home / 1,210.34-1,815.75-388.67

Finding the Fourth Proportional to 1,210.34, 1,815.75 and 388.67

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Solution

The fourth proportional to 1,210.34, 1,815.75 and 388.67 is: 583.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,210.34 : 1,815.75 = 388.67 : x
  2. Step 2: Convert to fraction form
    1,210.34/1,815.75 = 388.67/x
  3. Step 3: Cross multiply
    1,210.34x = 1,815.75 × 388.67
  4. Step 4: Simplify right side
    1,210.34x = 705,718.47
  5. Step 5: Solve for x
    x = 705,718.47/1,210.34
  6. Step 6: Final answer
    x = 583.08

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.