Home / 1,210.73-1,815.93-430.70

Finding the Fourth Proportional to 1,210.73, 1,815.93 and 430.70

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Solution

The fourth proportional to 1,210.73, 1,815.93 and 430.70 is: 645.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,210.73 : 1,815.93 = 430.70 : x
  2. Step 2: Convert to fraction form
    1,210.73/1,815.93 = 430.70/x
  3. Step 3: Cross multiply
    1,210.73x = 1,815.93 × 430.70
  4. Step 4: Simplify right side
    1,210.73x = 782,111.97
  5. Step 5: Solve for x
    x = 782,111.97/1,210.73
  6. Step 6: Final answer
    x = 645.99

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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.