Home / 427,249,237.20-640,593,919.80-168,308,437.20

Finding the Fourth Proportional to 427,249,237.20, 640,593,919.80 and 168,308,437.20

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Solution

The fourth proportional to 427,249,237.20, 640,593,919.80 and 168,308,437.20 is: 252,352,379.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,249,237.20 : 640,593,919.80 = 168,308,437.20 : x
  2. Step 2: Convert to fraction form
    427,249,237.20/640,593,919.80 = 168,308,437.20/x
  3. Step 3: Cross multiply
    427,249,237.20x = 640,593,919.80 × 168,308,437.20
  4. Step 4: Simplify right side
    427,249,237.20x = 107,817,361,521,360,128
  5. Step 5: Solve for x
    x = 107,817,361,521,360,128/427,249,237.20
  6. Step 6: Final answer
    x = 252,352,379.21

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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.