Home / 387,930.15-535,680-286,132.05

Finding the Fourth Proportional to 387,930.15, 535,680 and 286,132.05

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Solution

The fourth proportional to 387,930.15, 535,680 and 286,132.05 is: 395,110.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,930.15 : 535,680 = 286,132.05 : x
  2. Step 2: Convert to fraction form
    387,930.15/535,680 = 286,132.05/x
  3. Step 3: Cross multiply
    387,930.15x = 535,680 × 286,132.05
  4. Step 4: Simplify right side
    387,930.15x = 153,275,216,544
  5. Step 5: Solve for x
    x = 153,275,216,544/387,930.15
  6. Step 6: Final answer
    x = 395,110.35

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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.