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Finding the Fourth Proportional to 287,551,256.80, 431,326,885.20 and 287,551,256.80

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Solution

The fourth proportional to 287,551,256.80, 431,326,885.20 and 287,551,256.80 is: 431,326,885.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,551,256.80 : 431,326,885.20 = 287,551,256.80 : x
  2. Step 2: Convert to fraction form
    287,551,256.80/431,326,885.20 = 287,551,256.80/x
  3. Step 3: Cross multiply
    287,551,256.80x = 431,326,885.20 × 287,551,256.80
  4. Step 4: Simplify right side
    287,551,256.80x = 124,028,587,930,889,328
  5. Step 5: Solve for x
    x = 124,028,587,930,889,328/287,551,256.80
  6. Step 6: Final answer
    x = 431,326,885.20

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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.