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Finding the Fourth Proportional to 618,921,036.65, 928,381,554.98 and 618,921,036.65

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Solution

The fourth proportional to 618,921,036.65, 928,381,554.98 and 618,921,036.65 is: 928,381,554.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    618,921,036.65 : 928,381,554.98 = 618,921,036.65 : x
  2. Step 2: Convert to fraction form
    618,921,036.65/928,381,554.98 = 618,921,036.65/x
  3. Step 3: Cross multiply
    618,921,036.65x = 928,381,554.98 × 618,921,036.65
  4. Step 4: Simplify right side
    618,921,036.65x = 574,594,874,411,865,984
  5. Step 5: Solve for x
    x = 574,594,874,411,865,984/618,921,036.65
  6. Step 6: Final answer
    x = 928,381,554.98

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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.