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Finding the Fourth Proportional to 540,463.18, 745,913.31 and 311,015.74

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Solution

The fourth proportional to 540,463.18, 745,913.31 and 311,015.74 is: 429,244.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    540,463.18 : 745,913.31 = 311,015.74 : x
  2. Step 2: Convert to fraction form
    540,463.18/745,913.31 = 311,015.74/x
  3. Step 3: Cross multiply
    540,463.18x = 745,913.31 × 311,015.74
  4. Step 4: Simplify right side
    540,463.18x = 231,990,780,085.50
  5. Step 5: Solve for x
    x = 231,990,780,085.50/540,463.18
  6. Step 6: Final answer
    x = 429,244.38

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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.