Home / 390,831,209.46-586,265,668.92-128,509,952.76

Finding the Fourth Proportional to 390,831,209.46, 586,265,668.92 and 128,509,952.76

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Solution

The fourth proportional to 390,831,209.46, 586,265,668.92 and 128,509,952.76 is: 192,771,128.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,831,209.46 : 586,265,668.92 = 128,509,952.76 : x
  2. Step 2: Convert to fraction form
    390,831,209.46/586,265,668.92 = 128,509,952.76/x
  3. Step 3: Cross multiply
    390,831,209.46x = 586,265,668.92 × 128,509,952.76
  4. Step 4: Simplify right side
    390,831,209.46x = 75,340,973,417,718,992
  5. Step 5: Solve for x
    x = 75,340,973,417,718,992/390,831,209.46
  6. Step 6: Final answer
    x = 192,771,128.80

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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.