Home / 689,928,277,780.80-1,034,892,416,671.20-421,748,693,985.60

Finding the Fourth Proportional to 689,928,277,780.80, 1,034,892,416,671.20 and 421,748,693,985.60

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Solution

The fourth proportional to 689,928,277,780.80, 1,034,892,416,671.20 and 421,748,693,985.60 is: 632,623,040,978.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    689,928,277,780.80 : 1,034,892,416,671.20 = 421,748,693,985.60 : x
  2. Step 2: Convert to fraction form
    689,928,277,780.80/1,034,892,416,671.20 = 421,748,693,985.60/x
  3. Step 3: Cross multiply
    689,928,277,780.80x = 1,034,892,416,671.20 × 421,748,693,985.60
  4. Step 4: Simplify right side
    689,928,277,780.80x = 436,464,525,146,679,897,227,264
  5. Step 5: Solve for x
    x = 436,464,525,146,679,897,227,264/689,928,277,780.80
  6. Step 6: Final answer
    x = 632,623,040,978.40

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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.