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Finding the Fourth Proportional to 939,807.84, 1,296,900.12 and 510,078.74

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Solution

The fourth proportional to 939,807.84, 1,296,900.12 and 510,078.74 is: 703,889.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    939,807.84 : 1,296,900.12 = 510,078.74 : x
  2. Step 2: Convert to fraction form
    939,807.84/1,296,900.12 = 510,078.74/x
  3. Step 3: Cross multiply
    939,807.84x = 1,296,900.12 × 510,078.74
  4. Step 4: Simplify right side
    939,807.84x = 661,521,179,115.45
  5. Step 5: Solve for x
    x = 661,521,179,115.45/939,807.84
  6. Step 6: Final answer
    x = 703,889.83

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.