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Finding the Fourth Proportional to 311,645.59, 430,070.73 and 168,405.58

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Solution

The fourth proportional to 311,645.59, 430,070.73 and 168,405.58 is: 232,399.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,645.59 : 430,070.73 = 168,405.58 : x
  2. Step 2: Convert to fraction form
    311,645.59/430,070.73 = 168,405.58/x
  3. Step 3: Cross multiply
    311,645.59x = 430,070.73 × 168,405.58
  4. Step 4: Simplify right side
    311,645.59x = 72,426,310,726.67
  5. Step 5: Solve for x
    x = 72,426,310,726.67/311,645.59
  6. Step 6: Final answer
    x = 232,399.60

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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.