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Finding the Fourth Proportional to 1,435.36, 2,153.28 and 570.40

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Solution

The fourth proportional to 1,435.36, 2,153.28 and 570.40 is: 855.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,435.36 : 2,153.28 = 570.40 : x
  2. Step 2: Convert to fraction form
    1,435.36/2,153.28 = 570.40/x
  3. Step 3: Cross multiply
    1,435.36x = 2,153.28 × 570.40
  4. Step 4: Simplify right side
    1,435.36x = 1,228,230.91
  5. Step 5: Solve for x
    x = 1,228,230.91/1,435.36
  6. Step 6: Final answer
    x = 855.70

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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.