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Finding the Fourth Proportional to 312,955,902.90, 439,045,256.70 and 312,955,902.90

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Solution

The fourth proportional to 312,955,902.90, 439,045,256.70 and 312,955,902.90 is: 439,045,256.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,955,902.90 : 439,045,256.70 = 312,955,902.90 : x
  2. Step 2: Convert to fraction form
    312,955,902.90/439,045,256.70 = 312,955,902.90/x
  3. Step 3: Cross multiply
    312,955,902.90x = 439,045,256.70 × 312,955,902.90
  4. Step 4: Simplify right side
    312,955,902.90x = 137,401,804,724,510,768
  5. Step 5: Solve for x
    x = 137,401,804,724,510,768/312,955,902.90
  6. Step 6: Final answer
    x = 439,045,256.70

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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.