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Finding the Fourth Proportional to 315,765.93, 435,744.18 and 172,530.93

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Solution

The fourth proportional to 315,765.93, 435,744.18 and 172,530.93 is: 238,085.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,765.93 : 435,744.18 = 172,530.93 : x
  2. Step 2: Convert to fraction form
    315,765.93/435,744.18 = 172,530.93/x
  3. Step 3: Cross multiply
    315,765.93x = 435,744.18 × 172,530.93
  4. Step 4: Simplify right side
    315,765.93x = 75,179,348,617.49
  5. Step 5: Solve for x
    x = 75,179,348,617.49/315,765.93
  6. Step 6: Final answer
    x = 238,085.69

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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.