Home / 648,074.40-972,111.60-423,688.20

Finding the Fourth Proportional to 648,074.40, 972,111.60 and 423,688.20

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Solution

The fourth proportional to 648,074.40, 972,111.60 and 423,688.20 is: 635,532.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    648,074.40 : 972,111.60 = 423,688.20 : x
  2. Step 2: Convert to fraction form
    648,074.40/972,111.60 = 423,688.20/x
  3. Step 3: Cross multiply
    648,074.40x = 972,111.60 × 423,688.20
  4. Step 4: Simplify right side
    648,074.40x = 411,872,214,003.12
  5. Step 5: Solve for x
    x = 411,872,214,003.12/648,074.40
  6. Step 6: Final answer
    x = 635,532.30

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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.