Home / 387,980.83-581,936.64-135,218.32

Finding the Fourth Proportional to 387,980.83, 581,936.64 and 135,218.32

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Solution

The fourth proportional to 387,980.83, 581,936.64 and 135,218.32 is: 202,815.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,980.83 : 581,936.64 = 135,218.32 : x
  2. Step 2: Convert to fraction form
    387,980.83/581,936.64 = 135,218.32/x
  3. Step 3: Cross multiply
    387,980.83x = 581,936.64 × 135,218.32
  4. Step 4: Simplify right side
    387,980.83x = 78,688,494,807.24
  5. Step 5: Solve for x
    x = 78,688,494,807.24/387,980.83
  6. Step 6: Final answer
    x = 202,815.42

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1.5x scale

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.