Home / 716,831.85-989,209.03-390,151.23

Finding the Fourth Proportional to 716,831.85, 989,209.03 and 390,151.23

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Solution

The fourth proportional to 716,831.85, 989,209.03 and 390,151.23 is: 538,398.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,831.85 : 989,209.03 = 390,151.23 : x
  2. Step 2: Convert to fraction form
    716,831.85/989,209.03 = 390,151.23/x
  3. Step 3: Cross multiply
    716,831.85x = 989,209.03 × 390,151.23
  4. Step 4: Simplify right side
    716,831.85x = 385,941,122,489.83
  5. Step 5: Solve for x
    x = 385,941,122,489.83/716,831.85
  6. Step 6: Final answer
    x = 538,398.40

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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.