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Finding the Fourth Proportional to 656,160.42, 905,501.38 and 354,354.42

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Solution

The fourth proportional to 656,160.42, 905,501.38 and 354,354.42 is: 489,009.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,160.42 : 905,501.38 = 354,354.42 : x
  2. Step 2: Convert to fraction form
    656,160.42/905,501.38 = 354,354.42/x
  3. Step 3: Cross multiply
    656,160.42x = 905,501.38 × 354,354.42
  4. Step 4: Simplify right side
    656,160.42x = 320,868,416,319.10
  5. Step 5: Solve for x
    x = 320,868,416,319.10/656,160.42
  6. Step 6: Final answer
    x = 489,009.10

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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.