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Finding the Fourth Proportional to 718,488.40, 991,580.34 and 412,604.86

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Solution

The fourth proportional to 718,488.40, 991,580.34 and 412,604.86 is: 569,432.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,488.40 : 991,580.34 = 412,604.86 : x
  2. Step 2: Convert to fraction form
    718,488.40/991,580.34 = 412,604.86/x
  3. Step 3: Cross multiply
    718,488.40x = 991,580.34 × 412,604.86
  4. Step 4: Simplify right side
    718,488.40x = 409,130,867,364.45
  5. Step 5: Solve for x
    x = 409,130,867,364.45/718,488.40
  6. Step 6: Final answer
    x = 569,432.81

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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.