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Finding the Fourth Proportional to 646,073.40, 969,443.64 and 309,045.80

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Solution

The fourth proportional to 646,073.40, 969,443.64 and 309,045.80 is: 463,728.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    646,073.40 : 969,443.64 = 309,045.80 : x
  2. Step 2: Convert to fraction form
    646,073.40/969,443.64 = 309,045.80/x
  3. Step 3: Cross multiply
    646,073.40x = 969,443.64 × 309,045.80
  4. Step 4: Simplify right side
    646,073.40x = 299,602,485,278.71
  5. Step 5: Solve for x
    x = 299,602,485,278.71/646,073.40
  6. Step 6: Final answer
    x = 463,728.25

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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.