Home / 689,869.47-951,805.57-391,454.33

Finding the Fourth Proportional to 689,869.47, 951,805.57 and 391,454.33

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Solution

The fourth proportional to 689,869.47, 951,805.57 and 391,454.33 is: 540,085.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    689,869.47 : 951,805.57 = 391,454.33 : x
  2. Step 2: Convert to fraction form
    689,869.47/951,805.57 = 391,454.33/x
  3. Step 3: Cross multiply
    689,869.47x = 951,805.57 × 391,454.33
  4. Step 4: Simplify right side
    689,869.47x = 372,588,411,694.62
  5. Step 5: Solve for x
    x = 372,588,411,694.62/689,869.47
  6. Step 6: Final answer
    x = 540,085.38

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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.