Home / 1,315.83-1,973.52-438.25

Finding the Fourth Proportional to 1,315.83, 1,973.52 and 438.25

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Solution

The fourth proportional to 1,315.83, 1,973.52 and 438.25 is: 657.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,315.83 : 1,973.52 = 438.25 : x
  2. Step 2: Convert to fraction form
    1,315.83/1,973.52 = 438.25/x
  3. Step 3: Cross multiply
    1,315.83x = 1,973.52 × 438.25
  4. Step 4: Simplify right side
    1,315.83x = 864,895.14
  5. Step 5: Solve for x
    x = 864,895.14/1,315.83
  6. Step 6: Final answer
    x = 657.30

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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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.