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Finding the Fourth Proportional to 520,377.94, 718,127.13 and 305,520.58

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Solution

The fourth proportional to 520,377.94, 718,127.13 and 305,520.58 is: 421,621.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,377.94 : 718,127.13 = 305,520.58 : x
  2. Step 2: Convert to fraction form
    520,377.94/718,127.13 = 305,520.58/x
  3. Step 3: Cross multiply
    520,377.94x = 718,127.13 × 305,520.58
  4. Step 4: Simplify right side
    520,377.94x = 219,402,617,271.34
  5. Step 5: Solve for x
    x = 219,402,617,271.34/520,377.94
  6. Step 6: Final answer
    x = 421,621.67

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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.