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Finding the Fourth Proportional to 935,909.40, 1,403,864.10 and 817,811.40

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Solution

The fourth proportional to 935,909.40, 1,403,864.10 and 817,811.40 is: 1,226,717.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    935,909.40 : 1,403,864.10 = 817,811.40 : x
  2. Step 2: Convert to fraction form
    935,909.40/1,403,864.10 = 817,811.40/x
  3. Step 3: Cross multiply
    935,909.40x = 1,403,864.10 × 817,811.40
  4. Step 4: Simplify right side
    935,909.40x = 1,148,096,065,030.74
  5. Step 5: Solve for x
    x = 1,148,096,065,030.74/935,909.40
  6. Step 6: Final answer
    x = 1,226,717.10

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.