Home / 687,731.61-1,030,143.07-434,881.61

Finding the Fourth Proportional to 687,731.61, 1,030,143.07 and 434,881.61

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Solution

The fourth proportional to 687,731.61, 1,030,143.07 and 434,881.61 is: 651,402.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,731.61 : 1,030,143.07 = 434,881.61 : x
  2. Step 2: Convert to fraction form
    687,731.61/1,030,143.07 = 434,881.61/x
  3. Step 3: Cross multiply
    687,731.61x = 1,030,143.07 × 434,881.61
  4. Step 4: Simplify right side
    687,731.61x = 447,990,273,621.66
  5. Step 5: Solve for x
    x = 447,990,273,621.66/687,731.61
  6. Step 6: Final answer
    x = 651,402.76

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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.