Home / 989,123.37-1,483,668.95-315,195.57

Finding the Fourth Proportional to 989,123.37, 1,483,668.95 and 315,195.57

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Solution

The fourth proportional to 989,123.37, 1,483,668.95 and 315,195.57 is: 472,788.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    989,123.37 : 1,483,668.95 = 315,195.57 : x
  2. Step 2: Convert to fraction form
    989,123.37/1,483,668.95 = 315,195.57/x
  3. Step 3: Cross multiply
    989,123.37x = 1,483,668.95 × 315,195.57
  4. Step 4: Simplify right side
    989,123.37x = 467,645,878,810.57
  5. Step 5: Solve for x
    x = 467,645,878,810.57/989,123.37
  6. Step 6: Final answer
    x = 472,788.22

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Double scale
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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.