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Finding the Fourth Proportional to 719,154.95, 992,457.67 and 392,485.84

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Solution

The fourth proportional to 719,154.95, 992,457.67 and 392,485.84 is: 541,643.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    719,154.95 : 992,457.67 = 392,485.84 : x
  2. Step 2: Convert to fraction form
    719,154.95/992,457.67 = 392,485.84/x
  3. Step 3: Cross multiply
    719,154.95x = 992,457.67 × 392,485.84
  4. Step 4: Simplify right side
    719,154.95x = 389,525,583,269.66
  5. Step 5: Solve for x
    x = 389,525,583,269.66/719,154.95
  6. Step 6: Final answer
    x = 541,643.47

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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.