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Finding the Fourth Proportional to 315,191.76, 435,125.16 and 243,410.64

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Solution

The fourth proportional to 315,191.76, 435,125.16 and 243,410.64 is: 336,030.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,191.76 : 435,125.16 = 243,410.64 : x
  2. Step 2: Convert to fraction form
    315,191.76/435,125.16 = 243,410.64/x
  3. Step 3: Cross multiply
    315,191.76x = 435,125.16 × 243,410.64
  4. Step 4: Simplify right side
    315,191.76x = 105,914,093,675.70
  5. Step 5: Solve for x
    x = 105,914,093,675.70/315,191.76
  6. Step 6: Final answer
    x = 336,030.66

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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.