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Finding the Fourth Proportional to 612,685.94, 845,381.60 and 357,987.86

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Solution

The fourth proportional to 612,685.94, 845,381.60 and 357,987.86 is: 493,950.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,685.94 : 845,381.60 = 357,987.86 : x
  2. Step 2: Convert to fraction form
    612,685.94/845,381.60 = 357,987.86/x
  3. Step 3: Cross multiply
    612,685.94x = 845,381.60 × 357,987.86
  4. Step 4: Simplify right side
    612,685.94x = 302,636,349,867.38
  5. Step 5: Solve for x
    x = 302,636,349,867.38/612,685.94
  6. Step 6: Final answer
    x = 493,950.21

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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.