Home / 687,644.64-1,031,465.52-387,989.28

Finding the Fourth Proportional to 687,644.64, 1,031,465.52 and 387,989.28

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Solution

The fourth proportional to 687,644.64, 1,031,465.52 and 387,989.28 is: 581,983.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,644.64 : 1,031,465.52 = 387,989.28 : x
  2. Step 2: Convert to fraction form
    687,644.64/1,031,465.52 = 387,989.28/x
  3. Step 3: Cross multiply
    687,644.64x = 1,031,465.52 × 387,989.28
  4. Step 4: Simplify right side
    687,644.64x = 400,197,564,449.63
  5. Step 5: Solve for x
    x = 400,197,564,449.63/687,644.64
  6. Step 6: Final answer
    x = 581,983.11

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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.