Home / 509,408,194.89-702,985,689.57-289,403,693.13

Finding the Fourth Proportional to 509,408,194.89, 702,985,689.57 and 289,403,693.13

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Solution

The fourth proportional to 509,408,194.89, 702,985,689.57 and 289,403,693.13 is: 399,378,448.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    509,408,194.89 : 702,985,689.57 = 289,403,693.13 : x
  2. Step 2: Convert to fraction form
    509,408,194.89/702,985,689.57 = 289,403,693.13/x
  3. Step 3: Cross multiply
    509,408,194.89x = 702,985,689.57 × 289,403,693.13
  4. Step 4: Simplify right side
    509,408,194.89x = 203,446,654,779,097,728
  5. Step 5: Solve for x
    x = 203,446,654,779,097,728/509,408,194.89
  6. Step 6: Final answer
    x = 399,378,448.99

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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.