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Finding the Fourth Proportional to 914.32, 1,261.76 and 500.32

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Solution

The fourth proportional to 914.32, 1,261.76 and 500.32 is: 690.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    914.32 : 1,261.76 = 500.32 : x
  2. Step 2: Convert to fraction form
    914.32/1,261.76 = 500.32/x
  3. Step 3: Cross multiply
    914.32x = 1,261.76 × 500.32
  4. Step 4: Simplify right side
    914.32x = 631,283.76
  5. Step 5: Solve for x
    x = 631,283.76/914.32
  6. Step 6: Final answer
    x = 690.44

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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.