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Finding the Fourth Proportional to 670,490.56, 999,419.45 and 616,682.08

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Solution

The fourth proportional to 670,490.56, 999,419.45 and 616,682.08 is: 919,213.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    670,490.56 : 999,419.45 = 616,682.08 : x
  2. Step 2: Convert to fraction form
    670,490.56/999,419.45 = 616,682.08/x
  3. Step 3: Cross multiply
    670,490.56x = 999,419.45 × 616,682.08
  4. Step 4: Simplify right side
    670,490.56x = 616,324,065,218.46
  5. Step 5: Solve for x
    x = 616,324,065,218.46/670,490.56
  6. Step 6: Final answer
    x = 919,213.64

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.