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Finding the Fourth Proportional to 667,804.75, 999,312.65 and 578,155.80

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Solution

The fourth proportional to 667,804.75, 999,312.65 and 578,155.80 is: 865,160.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,804.75 : 999,312.65 = 578,155.80 : x
  2. Step 2: Convert to fraction form
    667,804.75/999,312.65 = 578,155.80/x
  3. Step 3: Cross multiply
    667,804.75x = 999,312.65 × 578,155.80
  4. Step 4: Simplify right side
    667,804.75x = 577,758,404,610.87
  5. Step 5: Solve for x
    x = 577,758,404,610.87/667,804.75
  6. Step 6: Final answer
    x = 865,160.67

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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.