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Finding the Fourth Proportional to 515,030.70, 772,546.05 and 486,000.30

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Solution

The fourth proportional to 515,030.70, 772,546.05 and 486,000.30 is: 729,000.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,030.70 : 772,546.05 = 486,000.30 : x
  2. Step 2: Convert to fraction form
    515,030.70/772,546.05 = 486,000.30/x
  3. Step 3: Cross multiply
    515,030.70x = 772,546.05 × 486,000.30
  4. Step 4: Simplify right side
    515,030.70x = 375,457,612,063.82
  5. Step 5: Solve for x
    x = 375,457,612,063.82/515,030.70
  6. Step 6: Final answer
    x = 729,000.45

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Double scale
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Similar ratio
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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.