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Finding the Fourth Proportional to 866,878.11, 1,300,326.06 and 387,130.32

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Solution

The fourth proportional to 866,878.11, 1,300,326.06 and 387,130.32 is: 580,699.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    866,878.11 : 1,300,326.06 = 387,130.32 : x
  2. Step 2: Convert to fraction form
    866,878.11/1,300,326.06 = 387,130.32/x
  3. Step 3: Cross multiply
    866,878.11x = 1,300,326.06 × 387,130.32
  4. Step 4: Simplify right side
    866,878.11x = 503,395,643,712.14
  5. Step 5: Solve for x
    x = 503,395,643,712.14/866,878.11
  6. Step 6: Final answer
    x = 580,699.45

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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.