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Finding the Fourth Proportional to 1,181,905.60, 1,771,821.60 and 708,779.20

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Solution

The fourth proportional to 1,181,905.60, 1,771,821.60 and 708,779.20 is: 1,062,547.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,181,905.60 : 1,771,821.60 = 708,779.20 : x
  2. Step 2: Convert to fraction form
    1,181,905.60/1,771,821.60 = 708,779.20/x
  3. Step 3: Cross multiply
    1,181,905.60x = 1,771,821.60 × 708,779.20
  4. Step 4: Simplify right side
    1,181,905.60x = 1,255,830,296,190.72
  5. Step 5: Solve for x
    x = 1,255,830,296,190.72/1,181,905.60
  6. Step 6: Final answer
    x = 1,062,547.04

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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.