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Finding the Fourth Proportional to 707,990.15, 977,021.56 and 385,700.51

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Solution

The fourth proportional to 707,990.15, 977,021.56 and 385,700.51 is: 532,264.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    707,990.15 : 977,021.56 = 385,700.51 : x
  2. Step 2: Convert to fraction form
    707,990.15/977,021.56 = 385,700.51/x
  3. Step 3: Cross multiply
    707,990.15x = 977,021.56 × 385,700.51
  4. Step 4: Simplify right side
    707,990.15x = 376,837,713,973.00
  5. Step 5: Solve for x
    x = 376,837,713,973.00/707,990.15
  6. Step 6: Final answer
    x = 532,264.06

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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.