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Finding the Fourth Proportional to 661,663.60, 993,013.80 and 306,721.60

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Solution

The fourth proportional to 661,663.60, 993,013.80 and 306,721.60 is: 460,322.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,663.60 : 993,013.80 = 306,721.60 : x
  2. Step 2: Convert to fraction form
    661,663.60/993,013.80 = 306,721.60/x
  3. Step 3: Cross multiply
    661,663.60x = 993,013.80 × 306,721.60
  4. Step 4: Simplify right side
    661,663.60x = 304,578,781,558.08
  5. Step 5: Solve for x
    x = 304,578,781,558.08/661,663.60
  6. Step 6: Final answer
    x = 460,322.71

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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.