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Finding the Fourth Proportional to 642,301.17, 886,470 and 370,315.80

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Solution

The fourth proportional to 642,301.17, 886,470 and 370,315.80 is: 511,090.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,301.17 : 886,470 = 370,315.80 : x
  2. Step 2: Convert to fraction form
    642,301.17/886,470 = 370,315.80/x
  3. Step 3: Cross multiply
    642,301.17x = 886,470 × 370,315.80
  4. Step 4: Simplify right side
    642,301.17x = 328,273,847,226
  5. Step 5: Solve for x
    x = 328,273,847,226/642,301.17
  6. Step 6: Final answer
    x = 511,090.22

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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.