Home / 687,289,188.61-948,490,312.61-405,043,541.65

Finding the Fourth Proportional to 687,289,188.61, 948,490,312.61 and 405,043,541.65

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Solution

The fourth proportional to 687,289,188.61, 948,490,312.61 and 405,043,541.65 is: 558,978,493.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,289,188.61 : 948,490,312.61 = 405,043,541.65 : x
  2. Step 2: Convert to fraction form
    687,289,188.61/948,490,312.61 = 405,043,541.65/x
  3. Step 3: Cross multiply
    687,289,188.61x = 948,490,312.61 × 405,043,541.65
  4. Step 4: Simplify right side
    687,289,188.61x = 384,179,875,442,477,760
  5. Step 5: Solve for x
    x = 384,179,875,442,477,760/687,289,188.61
  6. Step 6: Final answer
    x = 558,978,493.78

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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.