Home / 287,609,200.80-431,413,801.20-199,602,571.20

Finding the Fourth Proportional to 287,609,200.80, 431,413,801.20 and 199,602,571.20

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Solution

The fourth proportional to 287,609,200.80, 431,413,801.20 and 199,602,571.20 is: 299,403,856.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,609,200.80 : 431,413,801.20 = 199,602,571.20 : x
  2. Step 2: Convert to fraction form
    287,609,200.80/431,413,801.20 = 199,602,571.20/x
  3. Step 3: Cross multiply
    287,609,200.80x = 431,413,801.20 × 199,602,571.20
  4. Step 4: Simplify right side
    287,609,200.80x = 86,111,303,970,685,632
  5. Step 5: Solve for x
    x = 86,111,303,970,685,632/287,609,200.80
  6. Step 6: Final answer
    x = 299,403,856.80

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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.