Home / 661,515.85-912,959.67-389,669.32

Finding the Fourth Proportional to 661,515.85, 912,959.67 and 389,669.32

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Solution

The fourth proportional to 661,515.85, 912,959.67 and 389,669.32 is: 537,783.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,515.85 : 912,959.67 = 389,669.32 : x
  2. Step 2: Convert to fraction form
    661,515.85/912,959.67 = 389,669.32/x
  3. Step 3: Cross multiply
    661,515.85x = 912,959.67 × 389,669.32
  4. Step 4: Simplify right side
    661,515.85x = 355,752,373,796.32
  5. Step 5: Solve for x
    x = 355,752,373,796.32/661,515.85
  6. Step 6: Final answer
    x = 537,783.60

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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.