Home / 390,905,174.53-586,429,846.94-128,604,488.05

Finding the Fourth Proportional to 390,905,174.53, 586,429,846.94 and 128,604,488.05

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Solution

The fourth proportional to 390,905,174.53, 586,429,846.94 and 128,604,488.05 is: 192,930,447.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,905,174.53 : 586,429,846.94 = 128,604,488.05 : x
  2. Step 2: Convert to fraction form
    390,905,174.53/586,429,846.94 = 128,604,488.05/x
  3. Step 3: Cross multiply
    390,905,174.53x = 586,429,846.94 × 128,604,488.05
  4. Step 4: Simplify right side
    390,905,174.53x = 75,417,510,242,958,560
  5. Step 5: Solve for x
    x = 75,417,510,242,958,560/390,905,174.53
  6. Step 6: Final answer
    x = 192,930,447.48

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.