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Finding the Fourth Proportional to 714,681.42, 986,262.30 and 392,412.42

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Solution

The fourth proportional to 714,681.42, 986,262.30 and 392,412.42 is: 541,530.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    714,681.42 : 986,262.30 = 392,412.42 : x
  2. Step 2: Convert to fraction form
    714,681.42/986,262.30 = 392,412.42/x
  3. Step 3: Cross multiply
    714,681.42x = 986,262.30 × 392,412.42
  4. Step 4: Simplify right side
    714,681.42x = 387,021,575,897.77
  5. Step 5: Solve for x
    x = 387,021,575,897.77/714,681.42
  6. Step 6: Final answer
    x = 541,530.21

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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.