Home / 989,987.85-1,485,007.38-316,068.57

Finding the Fourth Proportional to 989,987.85, 1,485,007.38 and 316,068.57

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Solution

The fourth proportional to 989,987.85, 1,485,007.38 and 316,068.57 is: 474,111.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    989,987.85 : 1,485,007.38 = 316,068.57 : x
  2. Step 2: Convert to fraction form
    989,987.85/1,485,007.38 = 316,068.57/x
  3. Step 3: Cross multiply
    989,987.85x = 1,485,007.38 × 316,068.57
  4. Step 4: Simplify right side
    989,987.85x = 469,364,159,036.05
  5. Step 5: Solve for x
    x = 469,364,159,036.05/989,987.85
  6. Step 6: Final answer
    x = 474,111.03

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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.