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Finding the Fourth Proportional to 721,341.70, 995,138.64 and 434,698.90

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Solution

The fourth proportional to 721,341.70, 995,138.64 and 434,698.90 is: 599,695.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,341.70 : 995,138.64 = 434,698.90 : x
  2. Step 2: Convert to fraction form
    721,341.70/995,138.64 = 434,698.90/x
  3. Step 3: Cross multiply
    721,341.70x = 995,138.64 × 434,698.90
  4. Step 4: Simplify right side
    721,341.70x = 432,585,672,155.50
  5. Step 5: Solve for x
    x = 432,585,672,155.50/721,341.70
  6. Step 6: Final answer
    x = 599,695.92

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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.