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Finding the Fourth Proportional to 660,066.20, 988,349.70 and 520,098.20

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Solution

The fourth proportional to 660,066.20, 988,349.70 and 520,098.20 is: 778,768.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,066.20 : 988,349.70 = 520,098.20 : x
  2. Step 2: Convert to fraction form
    660,066.20/988,349.70 = 520,098.20/x
  3. Step 3: Cross multiply
    660,066.20x = 988,349.70 × 520,098.20
  4. Step 4: Simplify right side
    660,066.20x = 514,038,899,940.54
  5. Step 5: Solve for x
    x = 514,038,899,940.54/660,066.20
  6. Step 6: Final answer
    x = 778,768.71

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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.