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Finding the Fourth Proportional to 570.99, 787.98 and 309.01

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Solution

The fourth proportional to 570.99, 787.98 and 309.01 is: 426.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    570.99 : 787.98 = 309.01 : x
  2. Step 2: Convert to fraction form
    570.99/787.98 = 309.01/x
  3. Step 3: Cross multiply
    570.99x = 787.98 × 309.01
  4. Step 4: Simplify right side
    570.99x = 243,492.07
  5. Step 5: Solve for x
    x = 243,492.07/570.99
  6. Step 6: Final answer
    x = 426.44

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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.