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Finding the Fourth Proportional to 788,385,267.72, 1,087,978,718.84 and 435,984,969.15

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Solution

The fourth proportional to 788,385,267.72, 1,087,978,718.84 and 435,984,969.15 is: 601,663,155.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    788,385,267.72 : 1,087,978,718.84 = 435,984,969.15 : x
  2. Step 2: Convert to fraction form
    788,385,267.72/1,087,978,718.84 = 435,984,969.15/x
  3. Step 3: Cross multiply
    788,385,267.72x = 1,087,978,718.84 × 435,984,969.15
  4. Step 4: Simplify right side
    788,385,267.72x = 474,342,368,167,134,016
  5. Step 5: Solve for x
    x = 474,342,368,167,134,016/788,385,267.72
  6. Step 6: Final answer
    x = 601,663,155.81

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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.