Home / 280,680,779.90-387,319,812.90-163,197,775.28

Finding the Fourth Proportional to 280,680,779.90, 387,319,812.90 and 163,197,775.28

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Solution

The fourth proportional to 280,680,779.90, 387,319,812.90 and 163,197,775.28 is: 225,201,496.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,680,779.90 : 387,319,812.90 = 163,197,775.28 : x
  2. Step 2: Convert to fraction form
    280,680,779.90/387,319,812.90 = 163,197,775.28/x
  3. Step 3: Cross multiply
    280,680,779.90x = 387,319,812.90 × 163,197,775.28
  4. Step 4: Simplify right side
    280,680,779.90x = 63,209,731,787,145,840
  5. Step 5: Solve for x
    x = 63,209,731,787,145,840/280,680,779.90
  6. Step 6: Final answer
    x = 225,201,496.91

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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.