Home / 716,275.80-988,439.99-393,985.89

Finding the Fourth Proportional to 716,275.80, 988,439.99 and 393,985.89

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Solution

The fourth proportional to 716,275.80, 988,439.99 and 393,985.89 is: 543,689.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,275.80 : 988,439.99 = 393,985.89 : x
  2. Step 2: Convert to fraction form
    716,275.80/988,439.99 = 393,985.89/x
  3. Step 3: Cross multiply
    716,275.80x = 988,439.99 × 393,985.89
  4. Step 4: Simplify right side
    716,275.80x = 389,431,407,201.81
  5. Step 5: Solve for x
    x = 389,431,407,201.81/716,275.80
  6. Step 6: Final answer
    x = 543,689.19

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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.