Home / 987,720.49-1,480,899.93-388,750.42

Finding the Fourth Proportional to 987,720.49, 1,480,899.93 and 388,750.42

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Solution

The fourth proportional to 987,720.49, 1,480,899.93 and 388,750.42 is: 582,857.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    987,720.49 : 1,480,899.93 = 388,750.42 : x
  2. Step 2: Convert to fraction form
    987,720.49/1,480,899.93 = 388,750.42/x
  3. Step 3: Cross multiply
    987,720.49x = 1,480,899.93 × 388,750.42
  4. Step 4: Simplify right side
    987,720.49x = 575,700,472,345.50
  5. Step 5: Solve for x
    x = 575,700,472,345.50/987,720.49
  6. Step 6: Final answer
    x = 582,857.68

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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.