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Finding the Fourth Proportional to 611,548,038.40, 858,585,900.80 and 611,548,038.40

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Solution

The fourth proportional to 611,548,038.40, 858,585,900.80 and 611,548,038.40 is: 858,585,900.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,548,038.40 : 858,585,900.80 = 611,548,038.40 : x
  2. Step 2: Convert to fraction form
    611,548,038.40/858,585,900.80 = 611,548,038.40/x
  3. Step 3: Cross multiply
    611,548,038.40x = 858,585,900.80 × 611,548,038.40
  4. Step 4: Simplify right side
    611,548,038.40x = 525,066,523,432,136,960
  5. Step 5: Solve for x
    x = 525,066,523,432,136,960/611,548,038.40
  6. Step 6: Final answer
    x = 858,585,900.80

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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.