Home / 1,384,045.08-1,909,979.10-780,428.76

Finding the Fourth Proportional to 1,384,045.08, 1,909,979.10 and 780,428.76

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Solution

The fourth proportional to 1,384,045.08, 1,909,979.10 and 780,428.76 is: 1,076,989.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,384,045.08 : 1,909,979.10 = 780,428.76 : x
  2. Step 2: Convert to fraction form
    1,384,045.08/1,909,979.10 = 780,428.76/x
  3. Step 3: Cross multiply
    1,384,045.08x = 1,909,979.10 × 780,428.76
  4. Step 4: Simplify right side
    1,384,045.08x = 1,490,602,620,638.92
  5. Step 5: Solve for x
    x = 1,490,602,620,638.92/1,384,045.08
  6. Step 6: Final answer
    x = 1,076,989.93

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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.