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Finding the Fourth Proportional to 712,373.94, 983,079.18 and 390,086.28

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Solution

The fourth proportional to 712,373.94, 983,079.18 and 390,086.28 is: 538,320.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,373.94 : 983,079.18 = 390,086.28 : x
  2. Step 2: Convert to fraction form
    712,373.94/983,079.18 = 390,086.28/x
  3. Step 3: Cross multiply
    712,373.94x = 983,079.18 × 390,086.28
  4. Step 4: Simplify right side
    712,373.94x = 383,485,700,271.65
  5. Step 5: Solve for x
    x = 383,485,700,271.65/712,373.94
  6. Step 6: Final answer
    x = 538,320.79

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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.