Home / 391,585,899.04-540,403,959.28-215,390,289.04

Finding the Fourth Proportional to 391,585,899.04, 540,403,959.28 and 215,390,289.04

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Solution

The fourth proportional to 391,585,899.04, 540,403,959.28 and 215,390,289.04 is: 297,247,079.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,585,899.04 : 540,403,959.28 = 215,390,289.04 : x
  2. Step 2: Convert to fraction form
    391,585,899.04/540,403,959.28 = 215,390,289.04/x
  3. Step 3: Cross multiply
    391,585,899.04x = 540,403,959.28 × 215,390,289.04
  4. Step 4: Simplify right side
    391,585,899.04x = 116,397,764,987,679,584
  5. Step 5: Solve for x
    x = 116,397,764,987,679,584/391,585,899.04
  6. Step 6: Final answer
    x = 297,247,079.82

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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.