Home / 390,935,764.72-539,585,308.78-223,768,942.38

Finding the Fourth Proportional to 390,935,764.72, 539,585,308.78 and 223,768,942.38

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Solution

The fourth proportional to 390,935,764.72, 539,585,308.78 and 223,768,942.38 is: 308,854,918.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,935,764.72 : 539,585,308.78 = 223,768,942.38 : x
  2. Step 2: Convert to fraction form
    390,935,764.72/539,585,308.78 = 223,768,942.38/x
  3. Step 3: Cross multiply
    390,935,764.72x = 539,585,308.78 × 223,768,942.38
  4. Step 4: Simplify right side
    390,935,764.72x = 120,742,433,869,486,320
  5. Step 5: Solve for x
    x = 120,742,433,869,486,320/390,935,764.72
  6. Step 6: Final answer
    x = 308,854,918.80

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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.