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Finding the Fourth Proportional to 542,820.40, 815,008.20 and 306,624.40

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Solution

The fourth proportional to 542,820.40, 815,008.20 and 306,624.40 is: 460,375.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    542,820.40 : 815,008.20 = 306,624.40 : x
  2. Step 2: Convert to fraction form
    542,820.40/815,008.20 = 306,624.40/x
  3. Step 3: Cross multiply
    542,820.40x = 815,008.20 × 306,624.40
  4. Step 4: Simplify right side
    542,820.40x = 249,901,400,320.08
  5. Step 5: Solve for x
    x = 249,901,400,320.08/542,820.40
  6. Step 6: Final answer
    x = 460,375.84

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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.