Home / 1,210.26-1,670.28-738.05

Finding the Fourth Proportional to 1,210.26, 1,670.28 and 738.05

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Solution

The fourth proportional to 1,210.26, 1,670.28 and 738.05 is: 1,018.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,210.26 : 1,670.28 = 738.05 : x
  2. Step 2: Convert to fraction form
    1,210.26/1,670.28 = 738.05/x
  3. Step 3: Cross multiply
    1,210.26x = 1,670.28 × 738.05
  4. Step 4: Simplify right side
    1,210.26x = 1,232,741.80
  5. Step 5: Solve for x
    x = 1,232,741.80/1,210.26
  6. Step 6: Final answer
    x = 1,018.58

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Half scale
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Double scale
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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.