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Finding the Fourth Proportional to 405,686.40, 607,363.20 and 405,686.40

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Solution

The fourth proportional to 405,686.40, 607,363.20 and 405,686.40 is: 607,363.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,686.40 : 607,363.20 = 405,686.40 : x
  2. Step 2: Convert to fraction form
    405,686.40/607,363.20 = 405,686.40/x
  3. Step 3: Cross multiply
    405,686.40x = 607,363.20 × 405,686.40
  4. Step 4: Simplify right side
    405,686.40x = 246,398,990,100.48
  5. Step 5: Solve for x
    x = 246,398,990,100.48/405,686.40
  6. Step 6: Final answer
    x = 607,363.20

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1.5x scale

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.