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Finding the Fourth Proportional to 1,533.94, 2,300.55 and 438.40

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Solution

The fourth proportional to 1,533.94, 2,300.55 and 438.40 is: 657.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,533.94 : 2,300.55 = 438.40 : x
  2. Step 2: Convert to fraction form
    1,533.94/2,300.55 = 438.40/x
  3. Step 3: Cross multiply
    1,533.94x = 2,300.55 × 438.40
  4. Step 4: Simplify right side
    1,533.94x = 1,008,561.12
  5. Step 5: Solve for x
    x = 1,008,561.12/1,533.94
  6. Step 6: Final answer
    x = 657.50

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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.