Home / 287,864,261.80-431,796,392.70-165,420,255.40

Finding the Fourth Proportional to 287,864,261.80, 431,796,392.70 and 165,420,255.40

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Solution

The fourth proportional to 287,864,261.80, 431,796,392.70 and 165,420,255.40 is: 248,130,383.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,864,261.80 : 431,796,392.70 = 165,420,255.40 : x
  2. Step 2: Convert to fraction form
    287,864,261.80/431,796,392.70 = 165,420,255.40/x
  3. Step 3: Cross multiply
    287,864,261.80x = 431,796,392.70 × 165,420,255.40
  4. Step 4: Simplify right side
    287,864,261.80x = 71,427,869,561,232,696
  5. Step 5: Solve for x
    x = 71,427,869,561,232,696/287,864,261.80
  6. Step 6: Final answer
    x = 248,130,383.10

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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.