Home / 917,885.82-1,266,603.18-509,980.20

Finding the Fourth Proportional to 917,885.82, 1,266,603.18 and 509,980.20

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Solution

The fourth proportional to 917,885.82, 1,266,603.18 and 509,980.20 is: 703,728.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    917,885.82 : 1,266,603.18 = 509,980.20 : x
  2. Step 2: Convert to fraction form
    917,885.82/1,266,603.18 = 509,980.20/x
  3. Step 3: Cross multiply
    917,885.82x = 1,266,603.18 × 509,980.20
  4. Step 4: Simplify right side
    917,885.82x = 645,942,543,057.04
  5. Step 5: Solve for x
    x = 645,942,543,057.04/917,885.82
  6. Step 6: Final answer
    x = 703,728.64

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Double scale
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Similar ratio
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1.5x scale

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.