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Finding the Fourth Proportional to 953.19, 1,315.58 and 539.19

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Solution

The fourth proportional to 953.19, 1,315.58 and 539.19 is: 744.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    953.19 : 1,315.58 = 539.19 : x
  2. Step 2: Convert to fraction form
    953.19/1,315.58 = 539.19/x
  3. Step 3: Cross multiply
    953.19x = 1,315.58 × 539.19
  4. Step 4: Simplify right side
    953.19x = 709,347.58
  5. Step 5: Solve for x
    x = 709,347.58/953.19
  6. Step 6: Final answer
    x = 744.18

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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.