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Finding the Fourth Proportional to 611,213, 917,779.13 and 517,669.56

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Solution

The fourth proportional to 611,213, 917,779.13 and 517,669.56 is: 777,317.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,213 : 917,779.13 = 517,669.56 : x
  2. Step 2: Convert to fraction form
    611,213/917,779.13 = 517,669.56/x
  3. Step 3: Cross multiply
    611,213x = 917,779.13 × 517,669.56
  4. Step 4: Simplify right side
    611,213x = 475,106,318,404.28
  5. Step 5: Solve for x
    x = 475,106,318,404.28/611,213
  6. Step 6: Final answer
    x = 777,317.10

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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.