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Finding the Fourth Proportional to 311,435.55, 429,545.84 and 268,489.35

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Solution

The fourth proportional to 311,435.55, 429,545.84 and 268,489.35 is: 370,312.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,435.55 : 429,545.84 = 268,489.35 : x
  2. Step 2: Convert to fraction form
    311,435.55/429,545.84 = 268,489.35/x
  3. Step 3: Cross multiply
    311,435.55x = 429,545.84 × 268,489.35
  4. Step 4: Simplify right side
    311,435.55x = 115,328,482,034.36
  5. Step 5: Solve for x
    x = 115,328,482,034.36/311,435.55
  6. Step 6: Final answer
    x = 370,312.52

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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.