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Finding the Fourth Proportional to 543,315.40, 815,750.70 and 307,119.40

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Solution

The fourth proportional to 543,315.40, 815,750.70 and 307,119.40 is: 461,118.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,315.40 : 815,750.70 = 307,119.40 : x
  2. Step 2: Convert to fraction form
    543,315.40/815,750.70 = 307,119.40/x
  3. Step 3: Cross multiply
    543,315.40x = 815,750.70 × 307,119.40
  4. Step 4: Simplify right side
    543,315.40x = 250,532,865,533.58
  5. Step 5: Solve for x
    x = 250,532,865,533.58/543,315.40
  6. Step 6: Final answer
    x = 461,118.65

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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.