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Finding the Fourth Proportional to 704,435.63, 972,121.17 and 402,636.11

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Solution

The fourth proportional to 704,435.63, 972,121.17 and 402,636.11 is: 555,637.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    704,435.63 : 972,121.17 = 402,636.11 : x
  2. Step 2: Convert to fraction form
    704,435.63/972,121.17 = 402,636.11/x
  3. Step 3: Cross multiply
    704,435.63x = 972,121.17 × 402,636.11
  4. Step 4: Simplify right side
    704,435.63x = 391,411,086,337.45
  5. Step 5: Solve for x
    x = 391,411,086,337.45/704,435.63
  6. Step 6: Final answer
    x = 555,637.83

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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.