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Finding the Fourth Proportional to 640,036.90, 960,055.35 and 404,424.10

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Solution

The fourth proportional to 640,036.90, 960,055.35 and 404,424.10 is: 606,636.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,036.90 : 960,055.35 = 404,424.10 : x
  2. Step 2: Convert to fraction form
    640,036.90/960,055.35 = 404,424.10/x
  3. Step 3: Cross multiply
    640,036.90x = 960,055.35 × 404,424.10
  4. Step 4: Simplify right side
    640,036.90x = 388,269,520,873.94
  5. Step 5: Solve for x
    x = 388,269,520,873.94/640,036.90
  6. Step 6: Final answer
    x = 606,636.15

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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.