Home / 991,121.10-1,390,368.90-991,121.10

Finding the Fourth Proportional to 991,121.10, 1,390,368.90 and 991,121.10

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Solution

The fourth proportional to 991,121.10, 1,390,368.90 and 991,121.10 is: 1,390,368.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    991,121.10 : 1,390,368.90 = 991,121.10 : x
  2. Step 2: Convert to fraction form
    991,121.10/1,390,368.90 = 991,121.10/x
  3. Step 3: Cross multiply
    991,121.10x = 1,390,368.90 × 991,121.10
  4. Step 4: Simplify right side
    991,121.10x = 1,378,023,953,573.79
  5. Step 5: Solve for x
    x = 1,378,023,953,573.79/991,121.10
  6. Step 6: Final answer
    x = 1,390,368.90

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.