Home / 1,126,968,763.53-1,690,712,849.45-390,038,676.78

Finding the Fourth Proportional to 1,126,968,763.53, 1,690,712,849.45 and 390,038,676.78

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Solution

The fourth proportional to 1,126,968,763.53, 1,690,712,849.45 and 390,038,676.78 is: 585,147,897.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,126,968,763.53 : 1,690,712,849.45 = 390,038,676.78 : x
  2. Step 2: Convert to fraction form
    1,126,968,763.53/1,690,712,849.45 = 390,038,676.78/x
  3. Step 3: Cross multiply
    1,126,968,763.53x = 1,690,712,849.45 × 390,038,676.78
  4. Step 4: Simplify right side
    1,126,968,763.53x = 659,443,402,614,421,376
  5. Step 5: Solve for x
    x = 659,443,402,614,421,376/1,126,968,763.53
  6. Step 6: Final answer
    x = 585,147,897.58

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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.