Home / 718,431.12-990,405.02-565,203.59

Finding the Fourth Proportional to 718,431.12, 990,405.02 and 565,203.59

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Solution

The fourth proportional to 718,431.12, 990,405.02 and 565,203.59 is: 779,170.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,431.12 : 990,405.02 = 565,203.59 : x
  2. Step 2: Convert to fraction form
    718,431.12/990,405.02 = 565,203.59/x
  3. Step 3: Cross multiply
    718,431.12x = 990,405.02 × 565,203.59
  4. Step 4: Simplify right side
    718,431.12x = 559,780,473,033.02
  5. Step 5: Solve for x
    x = 559,780,473,033.02/718,431.12
  6. Step 6: Final answer
    x = 779,170.69

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Double scale
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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.