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Finding the Fourth Proportional to 667,305.59, 921,300.03 and 514,055.21

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Solution

The fourth proportional to 667,305.59, 921,300.03 and 514,055.21 is: 709,718.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,305.59 : 921,300.03 = 514,055.21 : x
  2. Step 2: Convert to fraction form
    667,305.59/921,300.03 = 514,055.21/x
  3. Step 3: Cross multiply
    667,305.59x = 921,300.03 × 514,055.21
  4. Step 4: Simplify right side
    667,305.59x = 473,599,075,788.16
  5. Step 5: Solve for x
    x = 473,599,075,788.16/667,305.59
  6. Step 6: Final answer
    x = 709,718.44

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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.