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Finding the Fourth Proportional to 873,253,722.60, 1,309,880,583.90 and 643,671,210.60

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Solution

The fourth proportional to 873,253,722.60, 1,309,880,583.90 and 643,671,210.60 is: 965,506,815.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    873,253,722.60 : 1,309,880,583.90 = 643,671,210.60 : x
  2. Step 2: Convert to fraction form
    873,253,722.60/1,309,880,583.90 = 643,671,210.60/x
  3. Step 3: Cross multiply
    873,253,722.60x = 1,309,880,583.90 × 643,671,210.60
  4. Step 4: Simplify right side
    873,253,722.60x = 843,132,421,180,347,904
  5. Step 5: Solve for x
    x = 843,132,421,180,347,904/873,253,722.60
  6. Step 6: Final answer
    x = 965,506,815.90

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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.