Home / 1,287,153.86-1,931,042.96-388,541.89

Finding the Fourth Proportional to 1,287,153.86, 1,931,042.96 and 388,541.89

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Solution

The fourth proportional to 1,287,153.86, 1,931,042.96 and 388,541.89 is: 582,907.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,287,153.86 : 1,931,042.96 = 388,541.89 : x
  2. Step 2: Convert to fraction form
    1,287,153.86/1,931,042.96 = 388,541.89/x
  3. Step 3: Cross multiply
    1,287,153.86x = 1,931,042.96 × 388,541.89
  4. Step 4: Simplify right side
    1,287,153.86x = 750,291,078,939.44
  5. Step 5: Solve for x
    x = 750,291,078,939.44/1,287,153.86
  6. Step 6: Final answer
    x = 582,907.06

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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.