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Finding the Fourth Proportional to 665,800.68, 918,804.78 and 363,994.68

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Solution

The fourth proportional to 665,800.68, 918,804.78 and 363,994.68 is: 502,312.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,800.68 : 918,804.78 = 363,994.68 : x
  2. Step 2: Convert to fraction form
    665,800.68/918,804.78 = 363,994.68/x
  3. Step 3: Cross multiply
    665,800.68x = 918,804.78 × 363,994.68
  4. Step 4: Simplify right side
    665,800.68x = 334,440,051,878.57
  5. Step 5: Solve for x
    x = 334,440,051,878.57/665,800.68
  6. Step 6: Final answer
    x = 502,312.57

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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.