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Finding the Fourth Proportional to 991,528, 1,368,425.28 and 589,120

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Solution

The fourth proportional to 991,528, 1,368,425.28 and 589,120 is: 813,054.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    991,528 : 1,368,425.28 = 589,120 : x
  2. Step 2: Convert to fraction form
    991,528/1,368,425.28 = 589,120/x
  3. Step 3: Cross multiply
    991,528x = 1,368,425.28 × 589,120
  4. Step 4: Simplify right side
    991,528x = 806,166,700,953.60
  5. Step 5: Solve for x
    x = 806,166,700,953.60/991,528
  6. Step 6: Final answer
    x = 813,054.90

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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.