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Finding the Fourth Proportional to 611,316.90, 915,782.46 and 400,315.14

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Solution

The fourth proportional to 611,316.90, 915,782.46 and 400,315.14 is: 599,691.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,316.90 : 915,782.46 = 400,315.14 : x
  2. Step 2: Convert to fraction form
    611,316.90/915,782.46 = 400,315.14/x
  3. Step 3: Cross multiply
    611,316.90x = 915,782.46 × 400,315.14
  4. Step 4: Simplify right side
    611,316.90x = 366,601,583,684.44
  5. Step 5: Solve for x
    x = 366,601,583,684.44/611,316.90
  6. Step 6: Final answer
    x = 599,691.56

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.