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Finding the Fourth Proportional to 621,507,718.40, 868,498,374.40 and 621,507,718.40

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Solution

The fourth proportional to 621,507,718.40, 868,498,374.40 and 621,507,718.40 is: 868,498,374.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,507,718.40 : 868,498,374.40 = 621,507,718.40 : x
  2. Step 2: Convert to fraction form
    621,507,718.40/868,498,374.40 = 621,507,718.40/x
  3. Step 3: Cross multiply
    621,507,718.40x = 868,498,374.40 × 621,507,718.40
  4. Step 4: Simplify right side
    621,507,718.40x = 539,778,443,107,452,928
  5. Step 5: Solve for x
    x = 539,778,443,107,452,928/621,507,718.40
  6. Step 6: Final answer
    x = 868,498,374.40

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1.5x scale

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.