Home / 687,023.64-948,059.28-381,112.20

Finding the Fourth Proportional to 687,023.64, 948,059.28 and 381,112.20

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Solution

The fourth proportional to 687,023.64, 948,059.28 and 381,112.20 is: 525,916.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,023.64 : 948,059.28 = 381,112.20 : x
  2. Step 2: Convert to fraction form
    687,023.64/948,059.28 = 381,112.20/x
  3. Step 3: Cross multiply
    687,023.64x = 948,059.28 × 381,112.20
  4. Step 4: Simplify right side
    687,023.64x = 361,316,957,931.22
  5. Step 5: Solve for x
    x = 361,316,957,931.22/687,023.64
  6. Step 6: Final answer
    x = 525,916.34

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1.5x scale

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.