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Finding the Fourth Proportional to 839,808,728.20, 1,259,713,092.30 and 788,748,401.80

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Solution

The fourth proportional to 839,808,728.20, 1,259,713,092.30 and 788,748,401.80 is: 1,183,122,602.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    839,808,728.20 : 1,259,713,092.30 = 788,748,401.80 : x
  2. Step 2: Convert to fraction form
    839,808,728.20/1,259,713,092.30 = 788,748,401.80/x
  3. Step 3: Cross multiply
    839,808,728.20x = 1,259,713,092.30 × 788,748,401.80
  4. Step 4: Simplify right side
    839,808,728.20x = 993,596,688,278,160,768
  5. Step 5: Solve for x
    x = 993,596,688,278,160,768/839,808,728.20
  6. Step 6: Final answer
    x = 1,183,122,602.70

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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.