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Finding the Fourth Proportional to 921.35, 1,382.57 and 373.45

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Solution

The fourth proportional to 921.35, 1,382.57 and 373.45 is: 560.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    921.35 : 1,382.57 = 373.45 : x
  2. Step 2: Convert to fraction form
    921.35/1,382.57 = 373.45/x
  3. Step 3: Cross multiply
    921.35x = 1,382.57 × 373.45
  4. Step 4: Simplify right side
    921.35x = 516,320.77
  5. Step 5: Solve for x
    x = 516,320.77/921.35
  6. Step 6: Final answer
    x = 560.40

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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.