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Finding the Fourth Proportional to 788,385,269.72, 1,087,978,721.60 and 435,984,971.15

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Solution

The fourth proportional to 788,385,269.72, 1,087,978,721.60 and 435,984,971.15 is: 601,663,158.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    788,385,269.72 : 1,087,978,721.60 = 435,984,971.15 : x
  2. Step 2: Convert to fraction form
    788,385,269.72/1,087,978,721.60 = 435,984,971.15/x
  3. Step 3: Cross multiply
    788,385,269.72x = 1,087,978,721.60 × 435,984,971.15
  4. Step 4: Simplify right side
    788,385,269.72x = 474,342,371,548,589,824
  5. Step 5: Solve for x
    x = 474,342,371,548,589,824/788,385,269.72
  6. Step 6: Final answer
    x = 601,663,158.57

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.