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Finding the Fourth Proportional to 651,962,909.80, 977,991,603.90 and 392,619,701.80

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Solution

The fourth proportional to 651,962,909.80, 977,991,603.90 and 392,619,701.80 is: 588,958,000.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    651,962,909.80 : 977,991,603.90 = 392,619,701.80 : x
  2. Step 2: Convert to fraction form
    651,962,909.80/977,991,603.90 = 392,619,701.80/x
  3. Step 3: Cross multiply
    651,962,909.80x = 977,991,603.90 × 392,619,701.80
  4. Step 4: Simplify right side
    651,962,909.80x = 383,978,771,886,121,728
  5. Step 5: Solve for x
    x = 383,978,771,886,121,728/651,962,909.80
  6. Step 6: Final answer
    x = 588,958,000.70

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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.