Home / 512,475,381.60-768,713,072.40-318,983,618.40

Finding the Fourth Proportional to 512,475,381.60, 768,713,072.40 and 318,983,618.40

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Solution

The fourth proportional to 512,475,381.60, 768,713,072.40 and 318,983,618.40 is: 478,475,427.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    512,475,381.60 : 768,713,072.40 = 318,983,618.40 : x
  2. Step 2: Convert to fraction form
    512,475,381.60/768,713,072.40 = 318,983,618.40/x
  3. Step 3: Cross multiply
    512,475,381.60x = 768,713,072.40 × 318,983,618.40
  4. Step 4: Simplify right side
    512,475,381.60x = 245,206,877,345,533,152
  5. Step 5: Solve for x
    x = 245,206,877,345,533,152/512,475,381.60
  6. Step 6: Final answer
    x = 478,475,427.60

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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.