Home / 425,721.36-638,631.45-141,437.28

Finding the Fourth Proportional to 425,721.36, 638,631.45 and 141,437.28

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Solution

The fourth proportional to 425,721.36, 638,631.45 and 141,437.28 is: 212,172.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,721.36 : 638,631.45 = 141,437.28 : x
  2. Step 2: Convert to fraction form
    425,721.36/638,631.45 = 141,437.28/x
  3. Step 3: Cross multiply
    425,721.36x = 638,631.45 × 141,437.28
  4. Step 4: Simplify right side
    425,721.36x = 90,326,295,210.46
  5. Step 5: Solve for x
    x = 90,326,295,210.46/425,721.36
  6. Step 6: Final answer
    x = 212,172.34

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.