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Finding the Fourth Proportional to 693,488.64, 957,011.19 and 387,564.80

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Solution

The fourth proportional to 693,488.64, 957,011.19 and 387,564.80 is: 534,837.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    693,488.64 : 957,011.19 = 387,564.80 : x
  2. Step 2: Convert to fraction form
    693,488.64/957,011.19 = 387,564.80/x
  3. Step 3: Cross multiply
    693,488.64x = 957,011.19 × 387,564.80
  4. Step 4: Simplify right side
    693,488.64x = 370,903,849,026.50
  5. Step 5: Solve for x
    x = 370,903,849,026.50/693,488.64
  6. Step 6: Final answer
    x = 534,837.67

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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.