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Finding the Fourth Proportional to 228,622.70, 315,495.87 and 128,024.30

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Solution

The fourth proportional to 228,622.70, 315,495.87 and 128,024.30 is: 176,671.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,622.70 : 315,495.87 = 128,024.30 : x
  2. Step 2: Convert to fraction form
    228,622.70/315,495.87 = 128,024.30/x
  3. Step 3: Cross multiply
    228,622.70x = 315,495.87 × 128,024.30
  4. Step 4: Simplify right side
    228,622.70x = 40,391,137,909.64
  5. Step 5: Solve for x
    x = 40,391,137,909.64/228,622.70
  6. Step 6: Final answer
    x = 176,671.60

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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.