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Finding the Fourth Proportional to 917.02, 1,265.63 and 603.20

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Solution

The fourth proportional to 917.02, 1,265.63 and 603.20 is: 832.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    917.02 : 1,265.63 = 603.20 : x
  2. Step 2: Convert to fraction form
    917.02/1,265.63 = 603.20/x
  3. Step 3: Cross multiply
    917.02x = 1,265.63 × 603.20
  4. Step 4: Simplify right side
    917.02x = 763,428.02
  5. Step 5: Solve for x
    x = 763,428.02/917.02
  6. Step 6: Final answer
    x = 832.51

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1.5x scale

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.