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Finding the Fourth Proportional to 840,146,871.80, 1,260,220,307.70 and 840,146,871.80

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Solution

The fourth proportional to 840,146,871.80, 1,260,220,307.70 and 840,146,871.80 is: 1,260,220,307.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    840,146,871.80 : 1,260,220,307.70 = 840,146,871.80 : x
  2. Step 2: Convert to fraction form
    840,146,871.80/1,260,220,307.70 = 840,146,871.80/x
  3. Step 3: Cross multiply
    840,146,871.80x = 1,260,220,307.70 × 840,146,871.80
  4. Step 4: Simplify right side
    840,146,871.80x = 1,058,770,149,292,988,416
  5. Step 5: Solve for x
    x = 1,058,770,149,292,988,416/840,146,871.80
  6. Step 6: Final answer
    x = 1,260,220,307.70

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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.