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Finding the Fourth Proportional to 403,611.40, 605,417.10 and 360,065.80

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Solution

The fourth proportional to 403,611.40, 605,417.10 and 360,065.80 is: 540,098.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,611.40 : 605,417.10 = 360,065.80 : x
  2. Step 2: Convert to fraction form
    403,611.40/605,417.10 = 360,065.80/x
  3. Step 3: Cross multiply
    403,611.40x = 605,417.10 × 360,065.80
  4. Step 4: Simplify right side
    403,611.40x = 217,989,992,445.18
  5. Step 5: Solve for x
    x = 217,989,992,445.18/403,611.40
  6. Step 6: Final answer
    x = 540,098.70

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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.