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Finding the Fourth Proportional to 709,528.77, 979,152.64 and 387,245.70

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Solution

The fourth proportional to 709,528.77, 979,152.64 and 387,245.70 is: 534,400.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,528.77 : 979,152.64 = 387,245.70 : x
  2. Step 2: Convert to fraction form
    709,528.77/979,152.64 = 387,245.70/x
  3. Step 3: Cross multiply
    709,528.77x = 979,152.64 × 387,245.70
  4. Step 4: Simplify right side
    709,528.77x = 379,172,648,515.53
  5. Step 5: Solve for x
    x = 379,172,648,515.53/709,528.77
  6. Step 6: Final answer
    x = 534,400.67

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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.