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Finding the Fourth Proportional to 309,328.68, 426,903.54 and 173,385.72

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Solution

The fourth proportional to 309,328.68, 426,903.54 and 173,385.72 is: 239,289.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,328.68 : 426,903.54 = 173,385.72 : x
  2. Step 2: Convert to fraction form
    309,328.68/426,903.54 = 173,385.72/x
  3. Step 3: Cross multiply
    309,328.68x = 426,903.54 × 173,385.72
  4. Step 4: Simplify right side
    309,328.68x = 74,018,977,653.45
  5. Step 5: Solve for x
    x = 74,018,977,653.45/309,328.68
  6. Step 6: Final answer
    x = 239,289.09

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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.