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Finding the Fourth Proportional to 707,989.15, 977,020.18 and 385,699.51

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Solution

The fourth proportional to 707,989.15, 977,020.18 and 385,699.51 is: 532,262.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    707,989.15 : 977,020.18 = 385,699.51 : x
  2. Step 2: Convert to fraction form
    707,989.15/977,020.18 = 385,699.51/x
  3. Step 3: Cross multiply
    707,989.15x = 977,020.18 × 385,699.51
  4. Step 4: Simplify right side
    707,989.15x = 376,836,204,686.11
  5. Step 5: Solve for x
    x = 376,836,204,686.11/707,989.15
  6. Step 6: Final answer
    x = 532,262.68

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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.