Home / 817,998.84-1,128,875.65-455,445.72

Finding the Fourth Proportional to 817,998.84, 1,128,875.65 and 455,445.72

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Solution

The fourth proportional to 817,998.84, 1,128,875.65 and 455,445.72 is: 628,535.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    817,998.84 : 1,128,875.65 = 455,445.72 : x
  2. Step 2: Convert to fraction form
    817,998.84/1,128,875.65 = 455,445.72/x
  3. Step 3: Cross multiply
    817,998.84x = 1,128,875.65 × 455,445.72
  4. Step 4: Simplify right side
    817,998.84x = 514,141,583,204.72
  5. Step 5: Solve for x
    x = 514,141,583,204.72/817,998.84
  6. Step 6: Final answer
    x = 628,535.83

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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.