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Finding the Fourth Proportional to 715,998.16, 988,050.90 and 393,689.08

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Solution

The fourth proportional to 715,998.16, 988,050.90 and 393,689.08 is: 543,276.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,998.16 : 988,050.90 = 393,689.08 : x
  2. Step 2: Convert to fraction form
    715,998.16/988,050.90 = 393,689.08/x
  3. Step 3: Cross multiply
    715,998.16x = 988,050.90 × 393,689.08
  4. Step 4: Simplify right side
    715,998.16x = 388,984,849,814.17
  5. Step 5: Solve for x
    x = 388,984,849,814.17/715,998.16
  6. Step 6: Final answer
    x = 543,276.33

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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.