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Finding the Fourth Proportional to 705,528, 973,639.10 and 399,596.76

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Solution

The fourth proportional to 705,528, 973,639.10 and 399,596.76 is: 551,449.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    705,528 : 973,639.10 = 399,596.76 : x
  2. Step 2: Convert to fraction form
    705,528/973,639.10 = 399,596.76/x
  3. Step 3: Cross multiply
    705,528x = 973,639.10 × 399,596.76
  4. Step 4: Simplify right side
    705,528x = 389,063,030,768.31
  5. Step 5: Solve for x
    x = 389,063,030,768.31/705,528
  6. Step 6: Final answer
    x = 551,449.45

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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.