Home / 642,240.66-886,281.02-355,754.74

Finding the Fourth Proportional to 642,240.66, 886,281.02 and 355,754.74

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Solution

The fourth proportional to 642,240.66, 886,281.02 and 355,754.74 is: 490,935.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,240.66 : 886,281.02 = 355,754.74 : x
  2. Step 2: Convert to fraction form
    642,240.66/886,281.02 = 355,754.74/x
  3. Step 3: Cross multiply
    642,240.66x = 886,281.02 × 355,754.74
  4. Step 4: Simplify right side
    642,240.66x = 315,298,673,837.04
  5. Step 5: Solve for x
    x = 315,298,673,837.04/642,240.66
  6. Step 6: Final answer
    x = 490,935.40

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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.