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Finding the Fourth Proportional to 704,437.63, 972,123.93 and 402,638.11

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Solution

The fourth proportional to 704,437.63, 972,123.93 and 402,638.11 is: 555,640.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    704,437.63 : 972,123.93 = 402,638.11 : x
  2. Step 2: Convert to fraction form
    704,437.63/972,123.93 = 402,638.11/x
  3. Step 3: Cross multiply
    704,437.63x = 972,123.93 × 402,638.11
  4. Step 4: Simplify right side
    704,437.63x = 391,414,141,860.97
  5. Step 5: Solve for x
    x = 391,414,141,860.97/704,437.63
  6. Step 6: Final answer
    x = 555,640.59

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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.