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Finding the Fourth Proportional to 620,021.76, 855,639.36 and 598,567.20

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Solution

The fourth proportional to 620,021.76, 855,639.36 and 598,567.20 is: 826,031.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,021.76 : 855,639.36 = 598,567.20 : x
  2. Step 2: Convert to fraction form
    620,021.76/855,639.36 = 598,567.20/x
  3. Step 3: Cross multiply
    620,021.76x = 855,639.36 × 598,567.20
  4. Step 4: Simplify right side
    620,021.76x = 512,157,655,924.99
  5. Step 5: Solve for x
    x = 512,157,655,924.99/620,021.76
  6. Step 6: Final answer
    x = 826,031.74

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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.