Home / 391,722,478.60-540,576,995.76-215,506,693.62

Finding the Fourth Proportional to 391,722,478.60, 540,576,995.76 and 215,506,693.62

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Solution

The fourth proportional to 391,722,478.60, 540,576,995.76 and 215,506,693.62 is: 297,399,223.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,722,478.60 : 540,576,995.76 = 215,506,693.62 : x
  2. Step 2: Convert to fraction form
    391,722,478.60/540,576,995.76 = 215,506,693.62/x
  3. Step 3: Cross multiply
    391,722,478.60x = 540,576,995.76 × 215,506,693.62
  4. Step 4: Simplify right side
    391,722,478.60x = 116,497,961,003,270,352
  5. Step 5: Solve for x
    x = 116,497,961,003,270,352/391,722,478.60
  6. Step 6: Final answer
    x = 297,399,223.60

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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.