Home / 781,688.71-1,079,403.64-491,783.49

Finding the Fourth Proportional to 781,688.71, 1,079,403.64 and 491,783.49

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Solution

The fourth proportional to 781,688.71, 1,079,403.64 and 491,783.49 is: 679,084.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    781,688.71 : 1,079,403.64 = 491,783.49 : x
  2. Step 2: Convert to fraction form
    781,688.71/1,079,403.64 = 491,783.49/x
  3. Step 3: Cross multiply
    781,688.71x = 1,079,403.64 × 491,783.49
  4. Step 4: Simplify right side
    781,688.71x = 530,832,883,800.89
  5. Step 5: Solve for x
    x = 530,832,883,800.89/781,688.71
  6. Step 6: Final answer
    x = 679,084.76

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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.