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Finding the Fourth Proportional to 265,963,615.80, 398,945,423.70 and 163,395,065.40

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Solution

The fourth proportional to 265,963,615.80, 398,945,423.70 and 163,395,065.40 is: 245,092,598.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    265,963,615.80 : 398,945,423.70 = 163,395,065.40 : x
  2. Step 2: Convert to fraction form
    265,963,615.80/398,945,423.70 = 163,395,065.40/x
  3. Step 3: Cross multiply
    265,963,615.80x = 398,945,423.70 × 163,395,065.40
  4. Step 4: Simplify right side
    265,963,615.80x = 65,185,713,596,492,208
  5. Step 5: Solve for x
    x = 65,185,713,596,492,208/265,963,615.80
  6. Step 6: Final answer
    x = 245,092,598.10

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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.