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Finding the Fourth Proportional to 1,307.99, 1,962.15 and 577.49

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Solution

The fourth proportional to 1,307.99, 1,962.15 and 577.49 is: 866.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,307.99 : 1,962.15 = 577.49 : x
  2. Step 2: Convert to fraction form
    1,307.99/1,962.15 = 577.49/x
  3. Step 3: Cross multiply
    1,307.99x = 1,962.15 × 577.49
  4. Step 4: Simplify right side
    1,307.99x = 1,133,122.00
  5. Step 5: Solve for x
    x = 1,133,122.00/1,307.99
  6. Step 6: Final answer
    x = 866.31

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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.