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Finding the Fourth Proportional to 645,125.70, 904,109.10 and 645,125.70

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Solution

The fourth proportional to 645,125.70, 904,109.10 and 645,125.70 is: 904,109.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,125.70 : 904,109.10 = 645,125.70 : x
  2. Step 2: Convert to fraction form
    645,125.70/904,109.10 = 645,125.70/x
  3. Step 3: Cross multiply
    645,125.70x = 904,109.10 × 645,125.70
  4. Step 4: Simplify right side
    645,125.70x = 583,264,016,013.87
  5. Step 5: Solve for x
    x = 583,264,016,013.87/645,125.70
  6. Step 6: Final answer
    x = 904,109.10

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1.5x scale

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.