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Finding the Fourth Proportional to 485,437.40, 727,637.70 and 185,802.20

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Solution

The fourth proportional to 485,437.40, 727,637.70 and 185,802.20 is: 278,504.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,437.40 : 727,637.70 = 185,802.20 : x
  2. Step 2: Convert to fraction form
    485,437.40/727,637.70 = 185,802.20/x
  3. Step 3: Cross multiply
    485,437.40x = 727,637.70 × 185,802.20
  4. Step 4: Simplify right side
    485,437.40x = 135,196,685,462.94
  5. Step 5: Solve for x
    x = 135,196,685,462.94/485,437.40
  6. Step 6: Final answer
    x = 278,504.88

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1.5x scale

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.