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Finding the Fourth Proportional to 312,153.35, 430,772.76 and 168,913.40

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Solution

The fourth proportional to 312,153.35, 430,772.76 and 168,913.40 is: 233,101.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,153.35 : 430,772.76 = 168,913.40 : x
  2. Step 2: Convert to fraction form
    312,153.35/430,772.76 = 168,913.40/x
  3. Step 3: Cross multiply
    312,153.35x = 430,772.76 × 168,913.40
  4. Step 4: Simplify right side
    312,153.35x = 72,763,289,365.12
  5. Step 5: Solve for x
    x = 72,763,289,365.12/312,153.35
  6. Step 6: Final answer
    x = 233,101.10

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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.