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Finding the Fourth Proportional to 539,143.40, 808,715.10 and 434,167.40

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Solution

The fourth proportional to 539,143.40, 808,715.10 and 434,167.40 is: 651,251.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    539,143.40 : 808,715.10 = 434,167.40 : x
  2. Step 2: Convert to fraction form
    539,143.40/808,715.10 = 434,167.40/x
  3. Step 3: Cross multiply
    539,143.40x = 808,715.10 × 434,167.40
  4. Step 4: Simplify right side
    539,143.40x = 351,117,732,307.74
  5. Step 5: Solve for x
    x = 351,117,732,307.74/539,143.40
  6. Step 6: Final answer
    x = 651,251.10

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Half scale
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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.