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Finding the Fourth Proportional to 1,303.21, 1,955.11 and 437.50

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Solution

The fourth proportional to 1,303.21, 1,955.11 and 437.50 is: 656.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,303.21 : 1,955.11 = 437.50 : x
  2. Step 2: Convert to fraction form
    1,303.21/1,955.11 = 437.50/x
  3. Step 3: Cross multiply
    1,303.21x = 1,955.11 × 437.50
  4. Step 4: Simplify right side
    1,303.21x = 855,360.63
  5. Step 5: Solve for x
    x = 855,360.63/1,303.21
  6. Step 6: Final answer
    x = 656.35

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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.