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Finding the Fourth Proportional to 714.02, 985.46 and 419.30

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Solution

The fourth proportional to 714.02, 985.46 and 419.30 is: 578.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    714.02 : 985.46 = 419.30 : x
  2. Step 2: Convert to fraction form
    714.02/985.46 = 419.30/x
  3. Step 3: Cross multiply
    714.02x = 985.46 × 419.30
  4. Step 4: Simplify right side
    714.02x = 413,203.38
  5. Step 5: Solve for x
    x = 413,203.38/714.02
  6. Step 6: Final answer
    x = 578.70

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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.