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Finding the Fourth Proportional to 528,100.99, 728,779.53 and 286,383.49

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Solution

The fourth proportional to 528,100.99, 728,779.53 and 286,383.49 is: 395,209.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,100.99 : 728,779.53 = 286,383.49 : x
  2. Step 2: Convert to fraction form
    528,100.99/728,779.53 = 286,383.49/x
  3. Step 3: Cross multiply
    528,100.99x = 728,779.53 × 286,383.49
  4. Step 4: Simplify right side
    528,100.99x = 208,710,421,598.06
  5. Step 5: Solve for x
    x = 208,710,421,598.06/528,100.99
  6. Step 6: Final answer
    x = 395,209.30

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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.