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Finding the Fourth Proportional to 472,392,605.20, 708,588,907.80 and 426,476,102.80

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Solution

The fourth proportional to 472,392,605.20, 708,588,907.80 and 426,476,102.80 is: 639,714,154.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    472,392,605.20 : 708,588,907.80 = 426,476,102.80 : x
  2. Step 2: Convert to fraction form
    472,392,605.20/708,588,907.80 = 426,476,102.80/x
  3. Step 3: Cross multiply
    472,392,605.20x = 708,588,907.80 × 426,476,102.80
  4. Step 4: Simplify right side
    472,392,605.20x = 302,196,235,885,852,480
  5. Step 5: Solve for x
    x = 302,196,235,885,852,480/472,392,605.20
  6. Step 6: Final answer
    x = 639,714,154.20

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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.