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Finding the Fourth Proportional to 710,280.18, 980,170.34 and 387,991.71

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Solution

The fourth proportional to 710,280.18, 980,170.34 and 387,991.71 is: 535,419.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,280.18 : 980,170.34 = 387,991.71 : x
  2. Step 2: Convert to fraction form
    710,280.18/980,170.34 = 387,991.71/x
  3. Step 3: Cross multiply
    710,280.18x = 980,170.34 × 387,991.71
  4. Step 4: Simplify right side
    710,280.18x = 380,297,964,367.92
  5. Step 5: Solve for x
    x = 380,297,964,367.92/710,280.18
  6. Step 6: Final answer
    x = 535,419.65

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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.