Home / 645,123.77-890,301.18-358,648.64

Finding the Fourth Proportional to 645,123.77, 890,301.18 and 358,648.64

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Solution

The fourth proportional to 645,123.77, 890,301.18 and 358,648.64 is: 494,952.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,123.77 : 890,301.18 = 358,648.64 : x
  2. Step 2: Convert to fraction form
    645,123.77/890,301.18 = 358,648.64/x
  3. Step 3: Cross multiply
    645,123.77x = 890,301.18 × 358,648.64
  4. Step 4: Simplify right side
    645,123.77x = 319,305,307,397.40
  5. Step 5: Solve for x
    x = 319,305,307,397.40/645,123.77
  6. Step 6: Final answer
    x = 494,952.01

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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.