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Finding the Fourth Proportional to 1,319,176.80, 1,977,404.40 and 718,869.60

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Solution

The fourth proportional to 1,319,176.80, 1,977,404.40 and 718,869.60 is: 1,077,562.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,319,176.80 : 1,977,404.40 = 718,869.60 : x
  2. Step 2: Convert to fraction form
    1,319,176.80/1,977,404.40 = 718,869.60/x
  3. Step 3: Cross multiply
    1,319,176.80x = 1,977,404.40 × 718,869.60
  4. Step 4: Simplify right side
    1,319,176.80x = 1,421,495,910,066.24
  5. Step 5: Solve for x
    x = 1,421,495,910,066.24/1,319,176.80
  6. Step 6: Final answer
    x = 1,077,562.85

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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.