Home / 712,921.44-983,831.58-390,643.76

Finding the Fourth Proportional to 712,921.44, 983,831.58 and 390,643.76

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Solution

The fourth proportional to 712,921.44, 983,831.58 and 390,643.76 is: 539,088.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,921.44 : 983,831.58 = 390,643.76 : x
  2. Step 2: Convert to fraction form
    712,921.44/983,831.58 = 390,643.76/x
  3. Step 3: Cross multiply
    712,921.44x = 983,831.58 × 390,643.76
  4. Step 4: Simplify right side
    712,921.44x = 384,327,667,617.94
  5. Step 5: Solve for x
    x = 384,327,667,617.94/712,921.44
  6. Step 6: Final answer
    x = 539,088.38

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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.