Home / 763,406.40-1,145,109.60-448,478.40

Finding the Fourth Proportional to 763,406.40, 1,145,109.60 and 448,478.40

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Solution

The fourth proportional to 763,406.40, 1,145,109.60 and 448,478.40 is: 672,717.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    763,406.40 : 1,145,109.60 = 448,478.40 : x
  2. Step 2: Convert to fraction form
    763,406.40/1,145,109.60 = 448,478.40/x
  3. Step 3: Cross multiply
    763,406.40x = 1,145,109.60 × 448,478.40
  4. Step 4: Simplify right side
    763,406.40x = 513,556,921,232.64
  5. Step 5: Solve for x
    x = 513,556,921,232.64/763,406.40
  6. Step 6: Final answer
    x = 672,717.60

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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.