Home / 648,119.20-972,178.80-637,621.60

Finding the Fourth Proportional to 648,119.20, 972,178.80 and 637,621.60

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Solution

The fourth proportional to 648,119.20, 972,178.80 and 637,621.60 is: 956,432.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    648,119.20 : 972,178.80 = 637,621.60 : x
  2. Step 2: Convert to fraction form
    648,119.20/972,178.80 = 637,621.60/x
  3. Step 3: Cross multiply
    648,119.20x = 972,178.80 × 637,621.60
  4. Step 4: Simplify right side
    648,119.20x = 619,882,201,942.08
  5. Step 5: Solve for x
    x = 619,882,201,942.08/648,119.20
  6. Step 6: Final answer
    x = 956,432.40

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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.