Home / 1,390,804,603.40-2,086,206,905.10-421,330,248.20

Finding the Fourth Proportional to 1,390,804,603.40, 2,086,206,905.10 and 421,330,248.20

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Solution

The fourth proportional to 1,390,804,603.40, 2,086,206,905.10 and 421,330,248.20 is: 631,995,372.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,390,804,603.40 : 2,086,206,905.10 = 421,330,248.20 : x
  2. Step 2: Convert to fraction form
    1,390,804,603.40/2,086,206,905.10 = 421,330,248.20/x
  3. Step 3: Cross multiply
    1,390,804,603.40x = 2,086,206,905.10 × 421,330,248.20
  4. Step 4: Simplify right side
    1,390,804,603.40x = 878,982,073,122,336,768
  5. Step 5: Solve for x
    x = 878,982,073,122,336,768/1,390,804,603.40
  6. Step 6: Final answer
    x = 631,995,372.30

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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.