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Finding the Fourth Proportional to 705.07, 973.00 and 390.35

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Solution

The fourth proportional to 705.07, 973.00 and 390.35 is: 538.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    705.07 : 973.00 = 390.35 : x
  2. Step 2: Convert to fraction form
    705.07/973.00 = 390.35/x
  3. Step 3: Cross multiply
    705.07x = 973.00 × 390.35
  4. Step 4: Simplify right side
    705.07x = 379,808.60
  5. Step 5: Solve for x
    x = 379,808.60/705.07
  6. Step 6: Final answer
    x = 538.68

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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.