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Finding the Fourth Proportional to 788,720.90, 1,180,748.55 and 742,583.30

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Solution

The fourth proportional to 788,720.90, 1,180,748.55 and 742,583.30 is: 1,111,678.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    788,720.90 : 1,180,748.55 = 742,583.30 : x
  2. Step 2: Convert to fraction form
    788,720.90/1,180,748.55 = 742,583.30/x
  3. Step 3: Cross multiply
    788,720.90x = 1,180,748.55 × 742,583.30
  4. Step 4: Simplify right side
    788,720.90x = 876,804,154,729.22
  5. Step 5: Solve for x
    x = 876,804,154,729.22/788,720.90
  6. Step 6: Final answer
    x = 1,111,678.61

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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.