Home / 287,688.24-431,532-77,326.20

Finding the Fourth Proportional to 287,688.24, 431,532 and 77,326.20

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Solution

The fourth proportional to 287,688.24, 431,532 and 77,326.20 is: 115,989.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,688.24 : 431,532 = 77,326.20 : x
  2. Step 2: Convert to fraction form
    287,688.24/431,532 = 77,326.20/x
  3. Step 3: Cross multiply
    287,688.24x = 431,532 × 77,326.20
  4. Step 4: Simplify right side
    287,688.24x = 33,368,729,738.40
  5. Step 5: Solve for x
    x = 33,368,729,738.40/287,688.24
  6. Step 6: Final answer
    x = 115,989.20

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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.