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Finding the Fourth Proportional to 639,023.40, 957,368.70 and 520,050.60

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Solution

The fourth proportional to 639,023.40, 957,368.70 and 520,050.60 is: 779,126.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,023.40 : 957,368.70 = 520,050.60 : x
  2. Step 2: Convert to fraction form
    639,023.40/957,368.70 = 520,050.60/x
  3. Step 3: Cross multiply
    639,023.40x = 957,368.70 × 520,050.60
  4. Step 4: Simplify right side
    639,023.40x = 497,880,166,856.22
  5. Step 5: Solve for x
    x = 497,880,166,856.22/639,023.40
  6. Step 6: Final answer
    x = 779,126.66

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.