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Finding the Fourth Proportional to 579,931.40, 869,897.10 and 411,969.80

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Solution

The fourth proportional to 579,931.40, 869,897.10 and 411,969.80 is: 617,954.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    579,931.40 : 869,897.10 = 411,969.80 : x
  2. Step 2: Convert to fraction form
    579,931.40/869,897.10 = 411,969.80/x
  3. Step 3: Cross multiply
    579,931.40x = 869,897.10 × 411,969.80
  4. Step 4: Simplify right side
    579,931.40x = 358,371,334,307.58
  5. Step 5: Solve for x
    x = 358,371,334,307.58/579,931.40
  6. Step 6: Final answer
    x = 617,954.70

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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.