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Finding the Fourth Proportional to 786,005.80, 1,179,008.70 and 779,007.40

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Solution

The fourth proportional to 786,005.80, 1,179,008.70 and 779,007.40 is: 1,168,511.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    786,005.80 : 1,179,008.70 = 779,007.40 : x
  2. Step 2: Convert to fraction form
    786,005.80/1,179,008.70 = 779,007.40/x
  3. Step 3: Cross multiply
    786,005.80x = 1,179,008.70 × 779,007.40
  4. Step 4: Simplify right side
    786,005.80x = 918,456,501,964.38
  5. Step 5: Solve for x
    x = 918,456,501,964.38/786,005.80
  6. Step 6: Final answer
    x = 1,168,511.10

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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.