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Finding the Fourth Proportional to 257,637,350.40, 386,456,025.60 and 257,637,350.40

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Solution

The fourth proportional to 257,637,350.40, 386,456,025.60 and 257,637,350.40 is: 386,456,025.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,637,350.40 : 386,456,025.60 = 257,637,350.40 : x
  2. Step 2: Convert to fraction form
    257,637,350.40/386,456,025.60 = 257,637,350.40/x
  3. Step 3: Cross multiply
    257,637,350.40x = 386,456,025.60 × 257,637,350.40
  4. Step 4: Simplify right side
    257,637,350.40x = 99,565,506,481,698,576
  5. Step 5: Solve for x
    x = 99,565,506,481,698,576/257,637,350.40
  6. Step 6: Final answer
    x = 386,456,025.60

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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.