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Finding the Fourth Proportional to 674,637.96, 931,066.74 and 388,170.12

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Solution

The fourth proportional to 674,637.96, 931,066.74 and 388,170.12 is: 535,712.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    674,637.96 : 931,066.74 = 388,170.12 : x
  2. Step 2: Convert to fraction form
    674,637.96/931,066.74 = 388,170.12/x
  3. Step 3: Cross multiply
    674,637.96x = 931,066.74 × 388,170.12
  4. Step 4: Simplify right side
    674,637.96x = 361,412,288,193.81
  5. Step 5: Solve for x
    x = 361,412,288,193.81/674,637.96
  6. Step 6: Final answer
    x = 535,712.94

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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.