Home / 815,999.45-1,125,609.89-509,543.78

Finding the Fourth Proportional to 815,999.45, 1,125,609.89 and 509,543.78

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Solution

The fourth proportional to 815,999.45, 1,125,609.89 and 509,543.78 is: 702,877.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    815,999.45 : 1,125,609.89 = 509,543.78 : x
  2. Step 2: Convert to fraction form
    815,999.45/1,125,609.89 = 509,543.78/x
  3. Step 3: Cross multiply
    815,999.45x = 1,125,609.89 × 509,543.78
  4. Step 4: Simplify right side
    815,999.45x = 573,547,509,980.22
  5. Step 5: Solve for x
    x = 573,547,509,980.22/815,999.45
  6. Step 6: Final answer
    x = 702,877.33

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.