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Finding the Fourth Proportional to 646,386.83, 969,646.47 and 247,363.21

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Solution

The fourth proportional to 646,386.83, 969,646.47 and 247,363.21 is: 371,070.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    646,386.83 : 969,646.47 = 247,363.21 : x
  2. Step 2: Convert to fraction form
    646,386.83/969,646.47 = 247,363.21/x
  3. Step 3: Cross multiply
    646,386.83x = 969,646.47 × 247,363.21
  4. Step 4: Simplify right side
    646,386.83x = 239,854,863,668.82
  5. Step 5: Solve for x
    x = 239,854,863,668.82/646,386.83
  6. Step 6: Final answer
    x = 371,070.16

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.