Home / 990,330.60-1,485,495.90-458,889.60

Finding the Fourth Proportional to 990,330.60, 1,485,495.90 and 458,889.60

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Solution

The fourth proportional to 990,330.60, 1,485,495.90 and 458,889.60 is: 688,334.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    990,330.60 : 1,485,495.90 = 458,889.60 : x
  2. Step 2: Convert to fraction form
    990,330.60/1,485,495.90 = 458,889.60/x
  3. Step 3: Cross multiply
    990,330.60x = 1,485,495.90 × 458,889.60
  4. Step 4: Simplify right side
    990,330.60x = 681,678,619,352.64
  5. Step 5: Solve for x
    x = 681,678,619,352.64/990,330.60
  6. Step 6: Final answer
    x = 688,334.40

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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.