Home / 645,128.70-904,113.30-645,128.70

Finding the Fourth Proportional to 645,128.70, 904,113.30 and 645,128.70

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Solution

The fourth proportional to 645,128.70, 904,113.30 and 645,128.70 is: 904,113.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,128.70 : 904,113.30 = 645,128.70 : x
  2. Step 2: Convert to fraction form
    645,128.70/904,113.30 = 645,128.70/x
  3. Step 3: Cross multiply
    645,128.70x = 904,113.30 × 645,128.70
  4. Step 4: Simplify right side
    645,128.70x = 583,269,437,881.71
  5. Step 5: Solve for x
    x = 583,269,437,881.71/645,128.70
  6. Step 6: Final answer
    x = 904,113.30

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Double scale
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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.