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Finding the Fourth Proportional to 520,063.70, 780,095.55 and 485,071.70

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Solution

The fourth proportional to 520,063.70, 780,095.55 and 485,071.70 is: 727,607.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,063.70 : 780,095.55 = 485,071.70 : x
  2. Step 2: Convert to fraction form
    520,063.70/780,095.55 = 485,071.70/x
  3. Step 3: Cross multiply
    520,063.70x = 780,095.55 × 485,071.70
  4. Step 4: Simplify right side
    520,063.70x = 378,402,274,600.94
  5. Step 5: Solve for x
    x = 378,402,274,600.94/520,063.70
  6. Step 6: Final answer
    x = 727,607.55

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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.