Home / 645,732.76-890,740.14-403,595.11

Finding the Fourth Proportional to 645,732.76, 890,740.14 and 403,595.11

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Solution

The fourth proportional to 645,732.76, 890,740.14 and 403,595.11 is: 556,729.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,732.76 : 890,740.14 = 403,595.11 : x
  2. Step 2: Convert to fraction form
    645,732.76/890,740.14 = 403,595.11/x
  3. Step 3: Cross multiply
    645,732.76x = 890,740.14 × 403,595.11
  4. Step 4: Simplify right side
    645,732.76x = 359,498,360,331.02
  5. Step 5: Solve for x
    x = 359,498,360,331.02/645,732.76
  6. Step 6: Final answer
    x = 556,729.32

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Double scale
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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.