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Finding the Fourth Proportional to 1,564, 2,345.94 and 394.02

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Solution

The fourth proportional to 1,564, 2,345.94 and 394.02 is: 591.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,564 : 2,345.94 = 394.02 : x
  2. Step 2: Convert to fraction form
    1,564/2,345.94 = 394.02/x
  3. Step 3: Cross multiply
    1,564x = 2,345.94 × 394.02
  4. Step 4: Simplify right side
    1,564x = 924,347.28
  5. Step 5: Solve for x
    x = 924,347.28/1,564
  6. Step 6: Final answer
    x = 591.01

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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.