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Finding the Fourth Proportional to 866,712.60, 1,300,068.90 and 511,543.80

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Solution

The fourth proportional to 866,712.60, 1,300,068.90 and 511,543.80 is: 767,315.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    866,712.60 : 1,300,068.90 = 511,543.80 : x
  2. Step 2: Convert to fraction form
    866,712.60/1,300,068.90 = 511,543.80/x
  3. Step 3: Cross multiply
    866,712.60x = 1,300,068.90 × 511,543.80
  4. Step 4: Simplify right side
    866,712.60x = 665,042,185,367.82
  5. Step 5: Solve for x
    x = 665,042,185,367.82/866,712.60
  6. Step 6: Final answer
    x = 767,315.70

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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.