Home / 928,145.40-1,280,899.85-520,247.35

Finding the Fourth Proportional to 928,145.40, 1,280,899.85 and 520,247.35

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Solution

The fourth proportional to 928,145.40, 1,280,899.85 and 520,247.35 is: 717,974.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    928,145.40 : 1,280,899.85 = 520,247.35 : x
  2. Step 2: Convert to fraction form
    928,145.40/1,280,899.85 = 520,247.35/x
  3. Step 3: Cross multiply
    928,145.40x = 1,280,899.85 × 520,247.35
  4. Step 4: Simplify right side
    928,145.40x = 666,384,750,170.02
  5. Step 5: Solve for x
    x = 666,384,750,170.02/928,145.40
  6. Step 6: Final answer
    x = 717,974.52

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Double scale
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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.