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Finding the Fourth Proportional to 708,392.81, 977,582.81 and 386,103.17

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Solution

The fourth proportional to 708,392.81, 977,582.81 and 386,103.17 is: 532,822.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    708,392.81 : 977,582.81 = 386,103.17 : x
  2. Step 2: Convert to fraction form
    708,392.81/977,582.81 = 386,103.17/x
  3. Step 3: Cross multiply
    708,392.81x = 977,582.81 × 386,103.17
  4. Step 4: Simplify right side
    708,392.81x = 377,447,817,955.85
  5. Step 5: Solve for x
    x = 377,447,817,955.85/708,392.81
  6. Step 6: Final answer
    x = 532,822.77

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Double scale
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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.