Home / 391,475,609.40-540,217,845.12-215,271,031.44

Finding the Fourth Proportional to 391,475,609.40, 540,217,845.12 and 215,271,031.44

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Solution

The fourth proportional to 391,475,609.40, 540,217,845.12 and 215,271,031.44 is: 297,063,852.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,475,609.40 : 540,217,845.12 = 215,271,031.44 : x
  2. Step 2: Convert to fraction form
    391,475,609.40/540,217,845.12 = 215,271,031.44/x
  3. Step 3: Cross multiply
    391,475,609.40x = 540,217,845.12 × 215,271,031.44
  4. Step 4: Simplify right side
    391,475,609.40x = 116,293,252,721,276,576
  5. Step 5: Solve for x
    x = 116,293,252,721,276,576/391,475,609.40
  6. Step 6: Final answer
    x = 297,063,852.58

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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.