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Finding the Fourth Proportional to 311,699.36, 430,145.20 and 168,459.20

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Solution

The fourth proportional to 311,699.36, 430,145.20 and 168,459.20 is: 232,473.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,699.36 : 430,145.20 = 168,459.20 : x
  2. Step 2: Convert to fraction form
    311,699.36/430,145.20 = 168,459.20/x
  3. Step 3: Cross multiply
    311,699.36x = 430,145.20 × 168,459.20
  4. Step 4: Simplify right side
    311,699.36x = 72,461,916,275.84
  5. Step 5: Solve for x
    x = 72,461,916,275.84/311,699.36
  6. Step 6: Final answer
    x = 232,473.74

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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.