Home / 505,109.12-697,066.86-287,312.16

Finding the Fourth Proportional to 505,109.12, 697,066.86 and 287,312.16

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Solution

The fourth proportional to 505,109.12, 697,066.86 and 287,312.16 is: 396,500.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    505,109.12 : 697,066.86 = 287,312.16 : x
  2. Step 2: Convert to fraction form
    505,109.12/697,066.86 = 287,312.16/x
  3. Step 3: Cross multiply
    505,109.12x = 697,066.86 × 287,312.16
  4. Step 4: Simplify right side
    505,109.12x = 200,275,788,902.44
  5. Step 5: Solve for x
    x = 200,275,788,902.44/505,109.12
  6. Step 6: Final answer
    x = 396,500.05

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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.