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Finding the Fourth Proportional to 287,600,999.20, 431,401,498.80 and 287,600,999.20

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Solution

The fourth proportional to 287,600,999.20, 431,401,498.80 and 287,600,999.20 is: 431,401,498.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,600,999.20 : 431,401,498.80 = 287,600,999.20 : x
  2. Step 2: Convert to fraction form
    287,600,999.20/431,401,498.80 = 287,600,999.20/x
  3. Step 3: Cross multiply
    287,600,999.20x = 431,401,498.80 × 287,600,999.20
  4. Step 4: Simplify right side
    287,600,999.20x = 124,071,502,111,257,600
  5. Step 5: Solve for x
    x = 124,071,502,111,257,600/287,600,999.20
  6. Step 6: Final answer
    x = 431,401,498.80

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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.