Home / 438,139.80-657,161.10-359,116.20

Finding the Fourth Proportional to 438,139.80, 657,161.10 and 359,116.20

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Solution

The fourth proportional to 438,139.80, 657,161.10 and 359,116.20 is: 538,634.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,139.80 : 657,161.10 = 359,116.20 : x
  2. Step 2: Convert to fraction form
    438,139.80/657,161.10 = 359,116.20/x
  3. Step 3: Cross multiply
    438,139.80x = 657,161.10 × 359,116.20
  4. Step 4: Simplify right side
    438,139.80x = 235,997,197,019.82
  5. Step 5: Solve for x
    x = 235,997,197,019.82/438,139.80
  6. Step 6: Final answer
    x = 538,634.47

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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.