Home / 318,893,187.20-478,339,780.80-290,675,638.40

Finding the Fourth Proportional to 318,893,187.20, 478,339,780.80 and 290,675,638.40

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Solution

The fourth proportional to 318,893,187.20, 478,339,780.80 and 290,675,638.40 is: 436,013,457.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,893,187.20 : 478,339,780.80 = 290,675,638.40 : x
  2. Step 2: Convert to fraction form
    318,893,187.20/478,339,780.80 = 290,675,638.40/x
  3. Step 3: Cross multiply
    318,893,187.20x = 478,339,780.80 × 290,675,638.40
  4. Step 4: Simplify right side
    318,893,187.20x = 139,041,721,156,156,048
  5. Step 5: Solve for x
    x = 139,041,721,156,156,048/318,893,187.20
  6. Step 6: Final answer
    x = 436,013,457.60

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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.