Home / 718,004.96-990,829.78-391,328.31

Finding the Fourth Proportional to 718,004.96, 990,829.78 and 391,328.31

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Solution

The fourth proportional to 718,004.96, 990,829.78 and 391,328.31 is: 540,023.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,004.96 : 990,829.78 = 391,328.31 : x
  2. Step 2: Convert to fraction form
    718,004.96/990,829.78 = 391,328.31/x
  3. Step 3: Cross multiply
    718,004.96x = 990,829.78 × 391,328.31
  4. Step 4: Simplify right side
    718,004.96x = 387,739,748,243.58
  5. Step 5: Solve for x
    x = 387,739,748,243.58/718,004.96
  6. Step 6: Final answer
    x = 540,023.77

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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.