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Finding the Fourth Proportional to 991,801.60, 1,490,812.80 and 973,139.20

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Solution

The fourth proportional to 991,801.60, 1,490,812.80 and 973,139.20 is: 1,462,760.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    991,801.60 : 1,490,812.80 = 973,139.20 : x
  2. Step 2: Convert to fraction form
    991,801.60/1,490,812.80 = 973,139.20/x
  3. Step 3: Cross multiply
    991,801.60x = 1,490,812.80 × 973,139.20
  4. Step 4: Simplify right side
    991,801.60x = 1,450,768,375,541.76
  5. Step 5: Solve for x
    x = 1,450,768,375,541.76/991,801.60
  6. Step 6: Final answer
    x = 1,462,760.67

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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.