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Finding the Fourth Proportional to 570.49, 855.70 and 278.01

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Solution

The fourth proportional to 570.49, 855.70 and 278.01 is: 417.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    570.49 : 855.70 = 278.01 : x
  2. Step 2: Convert to fraction form
    570.49/855.70 = 278.01/x
  3. Step 3: Cross multiply
    570.49x = 855.70 × 278.01
  4. Step 4: Simplify right side
    570.49x = 237,892.46
  5. Step 5: Solve for x
    x = 237,892.46/570.49
  6. Step 6: Final answer
    x = 417.00

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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.