Home / 718,721.15-991,817.81-396,424.32

Finding the Fourth Proportional to 718,721.15, 991,817.81 and 396,424.32

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Solution

The fourth proportional to 718,721.15, 991,817.81 and 396,424.32 is: 547,055.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,721.15 : 991,817.81 = 396,424.32 : x
  2. Step 2: Convert to fraction form
    718,721.15/991,817.81 = 396,424.32/x
  3. Step 3: Cross multiply
    718,721.15x = 991,817.81 × 396,424.32
  4. Step 4: Simplify right side
    718,721.15x = 393,180,698,911.02
  5. Step 5: Solve for x
    x = 393,180,698,911.02/718,721.15
  6. Step 6: Final answer
    x = 547,055.98

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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.