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Finding the Fourth Proportional to 386,411.40, 578,450.70 and 386,411.40

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Solution

The fourth proportional to 386,411.40, 578,450.70 and 386,411.40 is: 578,450.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,411.40 : 578,450.70 = 386,411.40 : x
  2. Step 2: Convert to fraction form
    386,411.40/578,450.70 = 386,411.40/x
  3. Step 3: Cross multiply
    386,411.40x = 578,450.70 × 386,411.40
  4. Step 4: Simplify right side
    386,411.40x = 223,519,944,817.98
  5. Step 5: Solve for x
    x = 223,519,944,817.98/386,411.40
  6. Step 6: Final answer
    x = 578,450.70

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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.