Home / 287,608,885.80-431,413,328.70-199,602,256.20

Finding the Fourth Proportional to 287,608,885.80, 431,413,328.70 and 199,602,256.20

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Solution

The fourth proportional to 287,608,885.80, 431,413,328.70 and 199,602,256.20 is: 299,403,384.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,608,885.80 : 431,413,328.70 = 199,602,256.20 : x
  2. Step 2: Convert to fraction form
    287,608,885.80/431,413,328.70 = 199,602,256.20/x
  3. Step 3: Cross multiply
    287,608,885.80x = 431,413,328.70 × 199,602,256.20
  4. Step 4: Simplify right side
    287,608,885.80x = 86,111,073,763,272,208
  5. Step 5: Solve for x
    x = 86,111,073,763,272,208/287,608,885.80
  6. Step 6: Final answer
    x = 299,403,384.30

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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.