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Finding the Fourth Proportional to 854,307.60, 1,279,711.80 and 433,820.40

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Solution

The fourth proportional to 854,307.60, 1,279,711.80 and 433,820.40 is: 649,842.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    854,307.60 : 1,279,711.80 = 433,820.40 : x
  2. Step 2: Convert to fraction form
    854,307.60/1,279,711.80 = 433,820.40/x
  3. Step 3: Cross multiply
    854,307.60x = 1,279,711.80 × 433,820.40
  4. Step 4: Simplify right side
    854,307.60x = 555,165,084,960.72
  5. Step 5: Solve for x
    x = 555,165,084,960.72/854,307.60
  6. Step 6: Final answer
    x = 649,842.15

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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.