Home / 736,746.80-1,105,120.20-421,235.60

Finding the Fourth Proportional to 736,746.80, 1,105,120.20 and 421,235.60

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Solution

The fourth proportional to 736,746.80, 1,105,120.20 and 421,235.60 is: 631,853.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    736,746.80 : 1,105,120.20 = 421,235.60 : x
  2. Step 2: Convert to fraction form
    736,746.80/1,105,120.20 = 421,235.60/x
  3. Step 3: Cross multiply
    736,746.80x = 1,105,120.20 × 421,235.60
  4. Step 4: Simplify right side
    736,746.80x = 465,515,970,519.12
  5. Step 5: Solve for x
    x = 465,515,970,519.12/736,746.80
  6. Step 6: Final answer
    x = 631,853.40

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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.