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Finding the Fourth Proportional to 307,698.45, 424,622.68 and 171,730.90

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Solution

The fourth proportional to 307,698.45, 424,622.68 and 171,730.90 is: 236,987.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    307,698.45 : 424,622.68 = 171,730.90 : x
  2. Step 2: Convert to fraction form
    307,698.45/424,622.68 = 171,730.90/x
  3. Step 3: Cross multiply
    307,698.45x = 424,622.68 × 171,730.90
  4. Step 4: Simplify right side
    307,698.45x = 72,920,834,996.81
  5. Step 5: Solve for x
    x = 72,920,834,996.81/307,698.45
  6. Step 6: Final answer
    x = 236,987.98

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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.