Home / 718,050.72-990,896.80-391,366.56

Finding the Fourth Proportional to 718,050.72, 990,896.80 and 391,366.56

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Solution

The fourth proportional to 718,050.72, 990,896.80 and 391,366.56 is: 540,078.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,050.72 : 990,896.80 = 391,366.56 : x
  2. Step 2: Convert to fraction form
    718,050.72/990,896.80 = 391,366.56/x
  3. Step 3: Cross multiply
    718,050.72x = 990,896.80 × 391,366.56
  4. Step 4: Simplify right side
    718,050.72x = 387,803,871,931.01
  5. Step 5: Solve for x
    x = 387,803,871,931.01/718,050.72
  6. Step 6: Final answer
    x = 540,078.66

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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.