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Finding the Fourth Proportional to 639,035.40, 957,386.70 and 520,062.60

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Solution

The fourth proportional to 639,035.40, 957,386.70 and 520,062.60 is: 779,144.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,035.40 : 957,386.70 = 520,062.60 : x
  2. Step 2: Convert to fraction form
    639,035.40/957,386.70 = 520,062.60/x
  3. Step 3: Cross multiply
    639,035.40x = 957,386.70 × 520,062.60
  4. Step 4: Simplify right side
    639,035.40x = 497,901,016,407.42
  5. Step 5: Solve for x
    x = 497,901,016,407.42/639,035.40
  6. Step 6: Final answer
    x = 779,144.66

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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.