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Finding the Fourth Proportional to 712,807.56, 983,674.20 and 390,529.08

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Solution

The fourth proportional to 712,807.56, 983,674.20 and 390,529.08 is: 538,930.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,807.56 : 983,674.20 = 390,529.08 : x
  2. Step 2: Convert to fraction form
    712,807.56/983,674.20 = 390,529.08/x
  3. Step 3: Cross multiply
    712,807.56x = 983,674.20 × 390,529.08
  4. Step 4: Simplify right side
    712,807.56x = 384,153,380,345.74
  5. Step 5: Solve for x
    x = 384,153,380,345.74/712,807.56
  6. Step 6: Final answer
    x = 538,930.00

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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.