Home / 390,905,083.35-586,429,710.17-128,604,396.87

Finding the Fourth Proportional to 390,905,083.35, 586,429,710.17 and 128,604,396.87

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Solution

The fourth proportional to 390,905,083.35, 586,429,710.17 and 128,604,396.87 is: 192,930,310.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,905,083.35 : 586,429,710.17 = 128,604,396.87 : x
  2. Step 2: Convert to fraction form
    390,905,083.35/586,429,710.17 = 128,604,396.87/x
  3. Step 3: Cross multiply
    390,905,083.35x = 586,429,710.17 × 128,604,396.87
  4. Step 4: Simplify right side
    390,905,083.35x = 75,417,439,182,418,736
  5. Step 5: Solve for x
    x = 75,417,439,182,418,736/390,905,083.35
  6. Step 6: Final answer
    x = 192,930,310.69

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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.