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Finding the Fourth Proportional to 714,119.25, 985,502.76 and 391,829.25

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Solution

The fourth proportional to 714,119.25, 985,502.76 and 391,829.25 is: 540,734.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    714,119.25 : 985,502.76 = 391,829.25 : x
  2. Step 2: Convert to fraction form
    714,119.25/985,502.76 = 391,829.25/x
  3. Step 3: Cross multiply
    714,119.25x = 985,502.76 × 391,829.25
  4. Step 4: Simplify right side
    714,119.25x = 386,148,807,323.73
  5. Step 5: Solve for x
    x = 386,148,807,323.73/714,119.25
  6. Step 6: Final answer
    x = 540,734.35

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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.