Home / 391,538,377.50-540,312,170.13-215,326,368.60

Finding the Fourth Proportional to 391,538,377.50, 540,312,170.13 and 215,326,368.60

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Solution

The fourth proportional to 391,538,377.50, 540,312,170.13 and 215,326,368.60 is: 297,144,454.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,538,377.50 : 540,312,170.13 = 215,326,368.60 : x
  2. Step 2: Convert to fraction form
    391,538,377.50/540,312,170.13 = 215,326,368.60/x
  3. Step 3: Cross multiply
    391,538,377.50x = 540,312,170.13 × 215,326,368.60
  4. Step 4: Simplify right side
    391,538,377.50x = 116,343,457,504,478,288
  5. Step 5: Solve for x
    x = 116,343,457,504,478,288/391,538,377.50
  6. Step 6: Final answer
    x = 297,144,454.26

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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.