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Finding the Fourth Proportional to 685,864.96, 946,483.36 and 379,940.40

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Solution

The fourth proportional to 685,864.96, 946,483.36 and 379,940.40 is: 524,312.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,864.96 : 946,483.36 = 379,940.40 : x
  2. Step 2: Convert to fraction form
    685,864.96/946,483.36 = 379,940.40/x
  3. Step 3: Cross multiply
    685,864.96x = 946,483.36 × 379,940.40
  4. Step 4: Simplify right side
    685,864.96x = 359,607,266,391.74
  5. Step 5: Solve for x
    x = 359,607,266,391.74/685,864.96
  6. Step 6: Final answer
    x = 524,312.05

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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.