Home / 664,420.20-916,581.06-434,876.46

Finding the Fourth Proportional to 664,420.20, 916,581.06 and 434,876.46

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Solution

The fourth proportional to 664,420.20, 916,581.06 and 434,876.46 is: 599,920.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,420.20 : 916,581.06 = 434,876.46 : x
  2. Step 2: Convert to fraction form
    664,420.20/916,581.06 = 434,876.46/x
  3. Step 3: Cross multiply
    664,420.20x = 916,581.06 × 434,876.46
  4. Step 4: Simplify right side
    664,420.20x = 398,599,526,675.85
  5. Step 5: Solve for x
    x = 398,599,526,675.85/664,420.20
  6. Step 6: Final answer
    x = 599,920.84

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.