Home / 642,988,347.20-887,328,538.08-349,630,815.68

Finding the Fourth Proportional to 642,988,347.20, 887,328,538.08 and 349,630,815.68

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Solution

The fourth proportional to 642,988,347.20, 887,328,538.08 and 349,630,815.68 is: 482,493,037.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,988,347.20 : 887,328,538.08 = 349,630,815.68 : x
  2. Step 2: Convert to fraction form
    642,988,347.20/887,328,538.08 = 349,630,815.68/x
  3. Step 3: Cross multiply
    642,988,347.20x = 887,328,538.08 × 349,630,815.68
  4. Step 4: Simplify right side
    642,988,347.20x = 310,237,400,545,052,352
  5. Step 5: Solve for x
    x = 310,237,400,545,052,352/642,988,347.20
  6. Step 6: Final answer
    x = 482,493,037.23

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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.