Home / 317,157.12-438,220.80-305,804.16

Finding the Fourth Proportional to 317,157.12, 438,220.80 and 305,804.16

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Solution

The fourth proportional to 317,157.12, 438,220.80 and 305,804.16 is: 422,534.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,157.12 : 438,220.80 = 305,804.16 : x
  2. Step 2: Convert to fraction form
    317,157.12/438,220.80 = 305,804.16/x
  3. Step 3: Cross multiply
    317,157.12x = 438,220.80 × 305,804.16
  4. Step 4: Simplify right side
    317,157.12x = 134,009,743,638.53
  5. Step 5: Solve for x
    x = 134,009,743,638.53/317,157.12
  6. Step 6: Final answer
    x = 422,534.24

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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.