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Finding the Fourth Proportional to 970.77, 1,455.79 and 354.32

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Solution

The fourth proportional to 970.77, 1,455.79 and 354.32 is: 531.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    970.77 : 1,455.79 = 354.32 : x
  2. Step 2: Convert to fraction form
    970.77/1,455.79 = 354.32/x
  3. Step 3: Cross multiply
    970.77x = 1,455.79 × 354.32
  4. Step 4: Simplify right side
    970.77x = 515,815.51
  5. Step 5: Solve for x
    x = 515,815.51/970.77
  6. Step 6: Final answer
    x = 531.35

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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.