Home / 387,930.65-535,680.69-286,132.55

Finding the Fourth Proportional to 387,930.65, 535,680.69 and 286,132.55

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Solution

The fourth proportional to 387,930.65, 535,680.69 and 286,132.55 is: 395,111.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,930.65 : 535,680.69 = 286,132.55 : x
  2. Step 2: Convert to fraction form
    387,930.65/535,680.69 = 286,132.55/x
  3. Step 3: Cross multiply
    387,930.65x = 535,680.69 × 286,132.55
  4. Step 4: Simplify right side
    387,930.65x = 153,275,681,815.46
  5. Step 5: Solve for x
    x = 153,275,681,815.46/387,930.65
  6. Step 6: Final answer
    x = 395,111.04

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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.