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Finding the Fourth Proportional to 425,761,214.30, 638,641,821.45 and 425,761,214.30

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Solution

The fourth proportional to 425,761,214.30, 638,641,821.45 and 425,761,214.30 is: 638,641,821.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,761,214.30 : 638,641,821.45 = 425,761,214.30 : x
  2. Step 2: Convert to fraction form
    425,761,214.30/638,641,821.45 = 425,761,214.30/x
  3. Step 3: Cross multiply
    425,761,214.30x = 638,641,821.45 × 425,761,214.30
  4. Step 4: Simplify right side
    425,761,214.30x = 271,908,917,403,315,808
  5. Step 5: Solve for x
    x = 271,908,917,403,315,808/425,761,214.30
  6. Step 6: Final answer
    x = 638,641,821.45

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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.