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Finding the Fourth Proportional to 506,483.28, 698,965.20 and 280,130.40

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Solution

The fourth proportional to 506,483.28, 698,965.20 and 280,130.40 is: 386,590.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    506,483.28 : 698,965.20 = 280,130.40 : x
  2. Step 2: Convert to fraction form
    506,483.28/698,965.20 = 280,130.40/x
  3. Step 3: Cross multiply
    506,483.28x = 698,965.20 × 280,130.40
  4. Step 4: Simplify right side
    506,483.28x = 195,801,401,062.08
  5. Step 5: Solve for x
    x = 195,801,401,062.08/506,483.28
  6. Step 6: Final answer
    x = 386,590.06

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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.