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Finding the Fourth Proportional to 1,298,621.80, 1,946,607.90 and 877,940.20

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Solution

The fourth proportional to 1,298,621.80, 1,946,607.90 and 877,940.20 is: 1,316,014.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,298,621.80 : 1,946,607.90 = 877,940.20 : x
  2. Step 2: Convert to fraction form
    1,298,621.80/1,946,607.90 = 877,940.20/x
  3. Step 3: Cross multiply
    1,298,621.80x = 1,946,607.90 × 877,940.20
  4. Step 4: Simplify right side
    1,298,621.80x = 1,709,005,329,047.58
  5. Step 5: Solve for x
    x = 1,709,005,329,047.58/1,298,621.80
  6. Step 6: Final answer
    x = 1,316,014.66

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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.