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Finding the Fourth Proportional to 642,264.48, 886,324.80 and 355,803.12

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Solution

The fourth proportional to 642,264.48, 886,324.80 and 355,803.12 is: 491,008.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,264.48 : 886,324.80 = 355,803.12 : x
  2. Step 2: Convert to fraction form
    642,264.48/886,324.80 = 355,803.12/x
  3. Step 3: Cross multiply
    642,264.48x = 886,324.80 × 355,803.12
  4. Step 4: Simplify right side
    642,264.48x = 315,357,129,173.38
  5. Step 5: Solve for x
    x = 315,357,129,173.38/642,264.48
  6. Step 6: Final answer
    x = 491,008.20

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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.