Home / 1,210.40-1,669.20-948.32

Finding the Fourth Proportional to 1,210.40, 1,669.20 and 948.32

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Solution

The fourth proportional to 1,210.40, 1,669.20 and 948.32 is: 1,307.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,210.40 : 1,669.20 = 948.32 : x
  2. Step 2: Convert to fraction form
    1,210.40/1,669.20 = 948.32/x
  3. Step 3: Cross multiply
    1,210.40x = 1,669.20 × 948.32
  4. Step 4: Simplify right side
    1,210.40x = 1,582,935.74
  5. Step 5: Solve for x
    x = 1,582,935.74/1,210.40
  6. Step 6: Final answer
    x = 1,307.78

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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.