Home / 287,475,337.20-431,213,005.80-205,845,999.60

Finding the Fourth Proportional to 287,475,337.20, 431,213,005.80 and 205,845,999.60

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Solution

The fourth proportional to 287,475,337.20, 431,213,005.80 and 205,845,999.60 is: 308,768,999.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,475,337.20 : 431,213,005.80 = 205,845,999.60 : x
  2. Step 2: Convert to fraction form
    287,475,337.20/431,213,005.80 = 205,845,999.60/x
  3. Step 3: Cross multiply
    287,475,337.20x = 431,213,005.80 × 205,845,999.60
  4. Step 4: Simplify right side
    287,475,337.20x = 88,763,472,219,421,600
  5. Step 5: Solve for x
    x = 88,763,472,219,421,600/287,475,337.20
  6. Step 6: Final answer
    x = 308,768,999.40

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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.