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Finding the Fourth Proportional to 391,305.04, 539,999.75 and 216,886.38

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Solution

The fourth proportional to 391,305.04, 539,999.75 and 216,886.38 is: 299,302.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,305.04 : 539,999.75 = 216,886.38 : x
  2. Step 2: Convert to fraction form
    391,305.04/539,999.75 = 216,886.38/x
  3. Step 3: Cross multiply
    391,305.04x = 539,999.75 × 216,886.38
  4. Step 4: Simplify right side
    391,305.04x = 117,118,590,978.41
  5. Step 5: Solve for x
    x = 117,118,590,978.41/391,305.04
  6. Step 6: Final answer
    x = 299,302.54

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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.