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Finding the Fourth Proportional to 1,140.40, 1,710.36 and 410.02

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Solution

The fourth proportional to 1,140.40, 1,710.36 and 410.02 is: 614.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,140.40 : 1,710.36 = 410.02 : x
  2. Step 2: Convert to fraction form
    1,140.40/1,710.36 = 410.02/x
  3. Step 3: Cross multiply
    1,140.40x = 1,710.36 × 410.02
  4. Step 4: Simplify right side
    1,140.40x = 701,281.81
  5. Step 5: Solve for x
    x = 701,281.81/1,140.40
  6. Step 6: Final answer
    x = 614.94

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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.