Home / 928,378.78-1,281,253.48-520,481.40

Finding the Fourth Proportional to 928,378.78, 1,281,253.48 and 520,481.40

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Solution

The fourth proportional to 928,378.78, 1,281,253.48 and 520,481.40 is: 718,315.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    928,378.78 : 1,281,253.48 = 520,481.40 : x
  2. Step 2: Convert to fraction form
    928,378.78/1,281,253.48 = 520,481.40/x
  3. Step 3: Cross multiply
    928,378.78x = 1,281,253.48 × 520,481.40
  4. Step 4: Simplify right side
    928,378.78x = 666,868,605,025.27
  5. Step 5: Solve for x
    x = 666,868,605,025.27/928,378.78
  6. Step 6: Final answer
    x = 718,315.22

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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.