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Finding the Fourth Proportional to 709,476.87, 979,100.99 and 403,545.39

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Solution

The fourth proportional to 709,476.87, 979,100.99 and 403,545.39 is: 556,905.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,476.87 : 979,100.99 = 403,545.39 : x
  2. Step 2: Convert to fraction form
    709,476.87/979,100.99 = 403,545.39/x
  3. Step 3: Cross multiply
    709,476.87x = 979,100.99 × 403,545.39
  4. Step 4: Simplify right side
    709,476.87x = 395,111,688,841.21
  5. Step 5: Solve for x
    x = 395,111,688,841.21/709,476.87
  6. Step 6: Final answer
    x = 556,905.67

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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.