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Finding the Fourth Proportional to 288,985.20, 433,477.80 and 91,993.20

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Solution

The fourth proportional to 288,985.20, 433,477.80 and 91,993.20 is: 137,989.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    288,985.20 : 433,477.80 = 91,993.20 : x
  2. Step 2: Convert to fraction form
    288,985.20/433,477.80 = 91,993.20/x
  3. Step 3: Cross multiply
    288,985.20x = 433,477.80 × 91,993.20
  4. Step 4: Simplify right side
    288,985.20x = 39,877,009,950.96
  5. Step 5: Solve for x
    x = 39,877,009,950.96/288,985.20
  6. Step 6: Final answer
    x = 137,989.80

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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.