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Finding the Fourth Proportional to 917.00, 1,374.53 and 429.65

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Solution

The fourth proportional to 917.00, 1,374.53 and 429.65 is: 644.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    917.00 : 1,374.53 = 429.65 : x
  2. Step 2: Convert to fraction form
    917.00/1,374.53 = 429.65/x
  3. Step 3: Cross multiply
    917.00x = 1,374.53 × 429.65
  4. Step 4: Simplify right side
    917.00x = 590,557.79
  5. Step 5: Solve for x
    x = 590,557.79/917.00
  6. Step 6: Final answer
    x = 644.01

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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.