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Finding the Fourth Proportional to 611,551,213.40, 858,590,345.80 and 611,551,213.40

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Solution

The fourth proportional to 611,551,213.40, 858,590,345.80 and 611,551,213.40 is: 858,590,345.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,551,213.40 : 858,590,345.80 = 611,551,213.40 : x
  2. Step 2: Convert to fraction form
    611,551,213.40/858,590,345.80 = 611,551,213.40/x
  3. Step 3: Cross multiply
    611,551,213.40x = 858,590,345.80 × 611,551,213.40
  4. Step 4: Simplify right side
    611,551,213.40x = 525,071,967,787,515,520
  5. Step 5: Solve for x
    x = 525,071,967,787,515,520/611,551,213.40
  6. Step 6: Final answer
    x = 858,590,345.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.