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Finding the Fourth Proportional to 620,746.30, 931,119.45 and 553,824.10

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Solution

The fourth proportional to 620,746.30, 931,119.45 and 553,824.10 is: 830,736.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,746.30 : 931,119.45 = 553,824.10 : x
  2. Step 2: Convert to fraction form
    620,746.30/931,119.45 = 553,824.10/x
  3. Step 3: Cross multiply
    620,746.30x = 931,119.45 × 553,824.10
  4. Step 4: Simplify right side
    620,746.30x = 515,676,391,388.75
  5. Step 5: Solve for x
    x = 515,676,391,388.75/620,746.30
  6. Step 6: Final answer
    x = 830,736.15

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Double scale
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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.