Home / 926,550,138.80-1,390,060,455.48-428,919,415.28

Finding the Fourth Proportional to 926,550,138.80, 1,390,060,455.48 and 428,919,415.28

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Solution

The fourth proportional to 926,550,138.80, 1,390,060,455.48 and 428,919,415.28 is: 643,488,023.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    926,550,138.80 : 1,390,060,455.48 = 428,919,415.28 : x
  2. Step 2: Convert to fraction form
    926,550,138.80/1,390,060,455.48 = 428,919,415.28/x
  3. Step 3: Cross multiply
    926,550,138.80x = 1,390,060,455.48 × 428,919,415.28
  4. Step 4: Simplify right side
    926,550,138.80x = 596,223,917,768,332,032
  5. Step 5: Solve for x
    x = 596,223,917,768,332,032/926,550,138.80
  6. Step 6: Final answer
    x = 643,488,023.80

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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.