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Finding the Fourth Proportional to 709,075.86, 978,530.93 and 386,787.39

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Solution

The fourth proportional to 709,075.86, 978,530.93 and 386,787.39 is: 533,770.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,075.86 : 978,530.93 = 386,787.39 : x
  2. Step 2: Convert to fraction form
    709,075.86/978,530.93 = 386,787.39/x
  3. Step 3: Cross multiply
    709,075.86x = 978,530.93 × 386,787.39
  4. Step 4: Simplify right side
    709,075.86x = 378,483,424,448.97
  5. Step 5: Solve for x
    x = 378,483,424,448.97/709,075.86
  6. Step 6: Final answer
    x = 533,770.00

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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.