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Finding the Fourth Proportional to 521,319.60, 783,145.80 and 500,065.20

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Solution

The fourth proportional to 521,319.60, 783,145.80 and 500,065.20 is: 751,216.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,319.60 : 783,145.80 = 500,065.20 : x
  2. Step 2: Convert to fraction form
    521,319.60/783,145.80 = 500,065.20/x
  3. Step 3: Cross multiply
    521,319.60x = 783,145.80 × 500,065.20
  4. Step 4: Simplify right side
    521,319.60x = 391,623,961,106.16
  5. Step 5: Solve for x
    x = 391,623,961,106.16/521,319.60
  6. Step 6: Final answer
    x = 751,216.65

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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.