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Finding the Fourth Proportional to 978,401.76, 1,349,937.81 and 564,837.36

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Solution

The fourth proportional to 978,401.76, 1,349,937.81 and 564,837.36 is: 779,327.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,401.76 : 1,349,937.81 = 564,837.36 : x
  2. Step 2: Convert to fraction form
    978,401.76/1,349,937.81 = 564,837.36/x
  3. Step 3: Cross multiply
    978,401.76x = 1,349,937.81 × 564,837.36
  4. Step 4: Simplify right side
    978,401.76x = 762,495,308,764.58
  5. Step 5: Solve for x
    x = 762,495,308,764.58/978,401.76
  6. Step 6: Final answer
    x = 779,327.41

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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.