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Finding the Fourth Proportional to 510,327.38, 704,376.78 and 395,378.66

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Solution

The fourth proportional to 510,327.38, 704,376.78 and 395,378.66 is: 545,719.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    510,327.38 : 704,376.78 = 395,378.66 : x
  2. Step 2: Convert to fraction form
    510,327.38/704,376.78 = 395,378.66/x
  3. Step 3: Cross multiply
    510,327.38x = 704,376.78 × 395,378.66
  4. Step 4: Simplify right side
    510,327.38x = 278,495,547,411.52
  5. Step 5: Solve for x
    x = 278,495,547,411.52/510,327.38
  6. Step 6: Final answer
    x = 545,719.39

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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.