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Finding the Fourth Proportional to 1,948,647.80, 2,920,784.70 and 938,253.80

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Solution

The fourth proportional to 1,948,647.80, 2,920,784.70 and 938,253.80 is: 1,406,327.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,948,647.80 : 2,920,784.70 = 938,253.80 : x
  2. Step 2: Convert to fraction form
    1,948,647.80/2,920,784.70 = 938,253.80/x
  3. Step 3: Cross multiply
    1,948,647.80x = 2,920,784.70 × 938,253.80
  4. Step 4: Simplify right side
    1,948,647.80x = 2,740,437,343,756.86
  5. Step 5: Solve for x
    x = 2,740,437,343,756.86/1,948,647.80
  6. Step 6: Final answer
    x = 1,406,327.68

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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.