Home / 306,947.76-423,607.36-172,820.40

Finding the Fourth Proportional to 306,947.76, 423,607.36 and 172,820.40

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Solution

The fourth proportional to 306,947.76, 423,607.36 and 172,820.40 is: 238,503.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    306,947.76 : 423,607.36 = 172,820.40 : x
  2. Step 2: Convert to fraction form
    306,947.76/423,607.36 = 172,820.40/x
  3. Step 3: Cross multiply
    306,947.76x = 423,607.36 × 172,820.40
  4. Step 4: Simplify right side
    306,947.76x = 73,207,993,398.14
  5. Step 5: Solve for x
    x = 73,207,993,398.14/306,947.76
  6. Step 6: Final answer
    x = 238,503.10

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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.