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Finding the Fourth Proportional to 403,391.70, 605,087.55 and 262,386.90

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Solution

The fourth proportional to 403,391.70, 605,087.55 and 262,386.90 is: 393,580.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,391.70 : 605,087.55 = 262,386.90 : x
  2. Step 2: Convert to fraction form
    403,391.70/605,087.55 = 262,386.90/x
  3. Step 3: Cross multiply
    403,391.70x = 605,087.55 × 262,386.90
  4. Step 4: Simplify right side
    403,391.70x = 158,767,046,473.10
  5. Step 5: Solve for x
    x = 158,767,046,473.10/403,391.70
  6. Step 6: Final answer
    x = 393,580.35

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Similar ratio
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1.5x scale

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.