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Finding the Fourth Proportional to 528,635.19, 729,518.76 and 286,918.11

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Solution

The fourth proportional to 528,635.19, 729,518.76 and 286,918.11 is: 395,948.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,635.19 : 729,518.76 = 286,918.11 : x
  2. Step 2: Convert to fraction form
    528,635.19/729,518.76 = 286,918.11/x
  3. Step 3: Cross multiply
    528,635.19x = 729,518.76 × 286,918.11
  4. Step 4: Simplify right side
    528,635.19x = 209,312,143,828.74
  5. Step 5: Solve for x
    x = 209,312,143,828.74/528,635.19
  6. Step 6: Final answer
    x = 395,948.18

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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.