Home / 685,075.95-945,174.36-398,360.25

Finding the Fourth Proportional to 685,075.95, 945,174.36 and 398,360.25

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Solution

The fourth proportional to 685,075.95, 945,174.36 and 398,360.25 is: 549,603.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,075.95 : 945,174.36 = 398,360.25 : x
  2. Step 2: Convert to fraction form
    685,075.95/945,174.36 = 398,360.25/x
  3. Step 3: Cross multiply
    685,075.95x = 945,174.36 × 398,360.25
  4. Step 4: Simplify right side
    685,075.95x = 376,519,894,343.19
  5. Step 5: Solve for x
    x = 376,519,894,343.19/685,075.95
  6. Step 6: Final answer
    x = 549,603.14

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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.