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Finding the Fourth Proportional to 509,360.65, 702,921.86 and 318,484.69

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Solution

The fourth proportional to 509,360.65, 702,921.86 and 318,484.69 is: 439,511.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    509,360.65 : 702,921.86 = 318,484.69 : x
  2. Step 2: Convert to fraction form
    509,360.65/702,921.86 = 318,484.69/x
  3. Step 3: Cross multiply
    509,360.65x = 702,921.86 × 318,484.69
  4. Step 4: Simplify right side
    509,360.65x = 223,869,850,676.32
  5. Step 5: Solve for x
    x = 223,869,850,676.32/509,360.65
  6. Step 6: Final answer
    x = 439,511.48

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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.