Home / 280,039,386.40-420,059,079.60-242,290,650.40

Finding the Fourth Proportional to 280,039,386.40, 420,059,079.60 and 242,290,650.40

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Solution

The fourth proportional to 280,039,386.40, 420,059,079.60 and 242,290,650.40 is: 363,435,975.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,039,386.40 : 420,059,079.60 = 242,290,650.40 : x
  2. Step 2: Convert to fraction form
    280,039,386.40/420,059,079.60 = 242,290,650.40/x
  3. Step 3: Cross multiply
    280,039,386.40x = 420,059,079.60 × 242,290,650.40
  4. Step 4: Simplify right side
    280,039,386.40x = 101,776,387,602,709,376
  5. Step 5: Solve for x
    x = 101,776,387,602,709,376/280,039,386.40
  6. Step 6: Final answer
    x = 363,435,975.60

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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.