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Finding the Fourth Proportional to 390,012,408,052.60, 585,018,612,078.90 and 390,012,408,052.60

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Solution

The fourth proportional to 390,012,408,052.60, 585,018,612,078.90 and 390,012,408,052.60 is: 585,018,612,078.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,012,408,052.60 : 585,018,612,078.90 = 390,012,408,052.60 : x
  2. Step 2: Convert to fraction form
    390,012,408,052.60/585,018,612,078.90 = 390,012,408,052.60/x
  3. Step 3: Cross multiply
    390,012,408,052.60x = 585,018,612,078.90 × 390,012,408,052.60
  4. Step 4: Simplify right side
    390,012,408,052.60x = 228,164,517,652,481,643,118,592
  5. Step 5: Solve for x
    x = 228,164,517,652,481,643,118,592/390,012,408,052.60
  6. Step 6: Final answer
    x = 585,018,612,078.90

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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.