Home / 390,472,290.40-585,296,642.94-128,088,326.20

Finding the Fourth Proportional to 390,472,290.40, 585,296,642.94 and 128,088,326.20

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Solution

The fourth proportional to 390,472,290.40, 585,296,642.94 and 128,088,326.20 is: 191,997,407.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,472,290.40 : 585,296,642.94 = 128,088,326.20 : x
  2. Step 2: Convert to fraction form
    390,472,290.40/585,296,642.94 = 128,088,326.20/x
  3. Step 3: Cross multiply
    390,472,290.40x = 585,296,642.94 × 128,088,326.20
  4. Step 4: Simplify right side
    390,472,290.40x = 74,969,667,324,663,664
  5. Step 5: Solve for x
    x = 74,969,667,324,663,664/390,472,290.40
  6. Step 6: Final answer
    x = 191,997,407.16

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.