Home / 939,990.40-1,409,985.60-308,924.80

Finding the Fourth Proportional to 939,990.40, 1,409,985.60 and 308,924.80

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Solution

The fourth proportional to 939,990.40, 1,409,985.60 and 308,924.80 is: 463,387.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    939,990.40 : 1,409,985.60 = 308,924.80 : x
  2. Step 2: Convert to fraction form
    939,990.40/1,409,985.60 = 308,924.80/x
  3. Step 3: Cross multiply
    939,990.40x = 1,409,985.60 × 308,924.80
  4. Step 4: Simplify right side
    939,990.40x = 435,579,519,482.88
  5. Step 5: Solve for x
    x = 435,579,519,482.88/939,990.40
  6. Step 6: Final answer
    x = 463,387.20

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Double scale
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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.