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Finding the Fourth Proportional to 287,699.45, 431,533.58 and 88,019.80

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Solution

The fourth proportional to 287,699.45, 431,533.58 and 88,019.80 is: 132,024.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,699.45 : 431,533.58 = 88,019.80 : x
  2. Step 2: Convert to fraction form
    287,699.45/431,533.58 = 88,019.80/x
  3. Step 3: Cross multiply
    287,699.45x = 431,533.58 × 88,019.80
  4. Step 4: Simplify right side
    287,699.45x = 37,983,497,885.95
  5. Step 5: Solve for x
    x = 37,983,497,885.95/287,699.45
  6. Step 6: Final answer
    x = 132,024.93

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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.