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Finding the Fourth Proportional to 528,101.60, 728,780.40 and 286,384.12

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Solution

The fourth proportional to 528,101.60, 728,780.40 and 286,384.12 is: 395,210.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,101.60 : 728,780.40 = 286,384.12 : x
  2. Step 2: Convert to fraction form
    528,101.60/728,780.40 = 286,384.12/x
  3. Step 3: Cross multiply
    528,101.60x = 728,780.40 × 286,384.12
  4. Step 4: Simplify right side
    528,101.60x = 208,711,133,527.25
  5. Step 5: Solve for x
    x = 208,711,133,527.25/528,101.60
  6. Step 6: Final answer
    x = 395,210.19

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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.