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Finding the Fourth Proportional to 912,903.70, 1,280,164.70 and 912,903.70

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Solution

The fourth proportional to 912,903.70, 1,280,164.70 and 912,903.70 is: 1,280,164.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    912,903.70 : 1,280,164.70 = 912,903.70 : x
  2. Step 2: Convert to fraction form
    912,903.70/1,280,164.70 = 912,903.70/x
  3. Step 3: Cross multiply
    912,903.70x = 1,280,164.70 × 912,903.70
  4. Step 4: Simplify right side
    912,903.70x = 1,168,667,091,239.39
  5. Step 5: Solve for x
    x = 1,168,667,091,239.39/912,903.70
  6. Step 6: Final answer
    x = 1,280,164.70

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.