Home / 415,931.40-623,897.10-398,435.40

Finding the Fourth Proportional to 415,931.40, 623,897.10 and 398,435.40

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Solution

The fourth proportional to 415,931.40, 623,897.10 and 398,435.40 is: 597,653.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    415,931.40 : 623,897.10 = 398,435.40 : x
  2. Step 2: Convert to fraction form
    415,931.40/623,897.10 = 398,435.40/x
  3. Step 3: Cross multiply
    415,931.40x = 623,897.10 × 398,435.40
  4. Step 4: Simplify right side
    415,931.40x = 248,582,690,597.34
  5. Step 5: Solve for x
    x = 248,582,690,597.34/415,931.40
  6. Step 6: Final answer
    x = 597,653.10

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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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.