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Finding the Fourth Proportional to 403,390.40, 605,085.60 and 384,036.80

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Solution

The fourth proportional to 403,390.40, 605,085.60 and 384,036.80 is: 576,055.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,390.40 : 605,085.60 = 384,036.80 : x
  2. Step 2: Convert to fraction form
    403,390.40/605,085.60 = 384,036.80/x
  3. Step 3: Cross multiply
    403,390.40x = 605,085.60 × 384,036.80
  4. Step 4: Simplify right side
    403,390.40x = 232,375,137,550.08
  5. Step 5: Solve for x
    x = 232,375,137,550.08/403,390.40
  6. Step 6: Final answer
    x = 576,055.20

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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.