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Finding the Fourth Proportional to 659,379.78, 909,965.61 and 430,087.14

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Solution

The fourth proportional to 659,379.78, 909,965.61 and 430,087.14 is: 593,534.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,379.78 : 909,965.61 = 430,087.14 : x
  2. Step 2: Convert to fraction form
    659,379.78/909,965.61 = 430,087.14/x
  3. Step 3: Cross multiply
    659,379.78x = 909,965.61 × 430,087.14
  4. Step 4: Simplify right side
    659,379.78x = 391,364,506,703.26
  5. Step 5: Solve for x
    x = 391,364,506,703.26/659,379.78
  6. Step 6: Final answer
    x = 593,534.29

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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.