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Finding the Fourth Proportional to 691,407, 954,141.72 and 373,455

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Solution

The fourth proportional to 691,407, 954,141.72 and 373,455 is: 515,367.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    691,407 : 954,141.72 = 373,455 : x
  2. Step 2: Convert to fraction form
    691,407/954,141.72 = 373,455/x
  3. Step 3: Cross multiply
    691,407x = 954,141.72 × 373,455
  4. Step 4: Simplify right side
    691,407x = 356,328,996,042.60
  5. Step 5: Solve for x
    x = 356,328,996,042.60/691,407
  6. Step 6: Final answer
    x = 515,367.93

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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.