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Finding the Fourth Proportional to 612.32, 918.74 and 304.18

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Solution

The fourth proportional to 612.32, 918.74 and 304.18 is: 456.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    612.32 : 918.74 = 304.18 : x
  2. Step 2: Convert to fraction form
    612.32/918.74 = 304.18/x
  3. Step 3: Cross multiply
    612.32x = 918.74 × 304.18
  4. Step 4: Simplify right side
    612.32x = 279,460.80
  5. Step 5: Solve for x
    x = 279,460.80/612.32
  6. Step 6: Final answer
    x = 456.40

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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.