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Finding the Fourth Proportional to 693,130.33, 956,485.66 and 387,145.81

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Solution

The fourth proportional to 693,130.33, 956,485.66 and 387,145.81 is: 534,242.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    693,130.33 : 956,485.66 = 387,145.81 : x
  2. Step 2: Convert to fraction form
    693,130.33/956,485.66 = 387,145.81/x
  3. Step 3: Cross multiply
    693,130.33x = 956,485.66 × 387,145.81
  4. Step 4: Simplify right side
    693,130.33x = 370,299,408,875.93
  5. Step 5: Solve for x
    x = 370,299,408,875.93/693,130.33
  6. Step 6: Final answer
    x = 534,242.11

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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.