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Finding the Fourth Proportional to 707,988.15, 977,018.81 and 385,698.51

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Solution

The fourth proportional to 707,988.15, 977,018.81 and 385,698.51 is: 532,261.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    707,988.15 : 977,018.81 = 385,698.51 : x
  2. Step 2: Convert to fraction form
    707,988.15/977,018.81 = 385,698.51/x
  3. Step 3: Cross multiply
    707,988.15x = 977,018.81 × 385,698.51
  4. Step 4: Simplify right side
    707,988.15x = 376,834,697,330.48
  5. Step 5: Solve for x
    x = 376,834,697,330.48/707,988.15
  6. Step 6: Final answer
    x = 532,261.31

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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.