Home / 1,238,493,698.40-1,857,740,547.60-420,605,999.40

Finding the Fourth Proportional to 1,238,493,698.40, 1,857,740,547.60 and 420,605,999.40

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Solution

The fourth proportional to 1,238,493,698.40, 1,857,740,547.60 and 420,605,999.40 is: 630,908,999.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,238,493,698.40 : 1,857,740,547.60 = 420,605,999.40 : x
  2. Step 2: Convert to fraction form
    1,238,493,698.40/1,857,740,547.60 = 420,605,999.40/x
  3. Step 3: Cross multiply
    1,238,493,698.40x = 1,857,740,547.60 × 420,605,999.40
  4. Step 4: Simplify right side
    1,238,493,698.40x = 781,376,819,649,201,152
  5. Step 5: Solve for x
    x = 781,376,819,649,201,152/1,238,493,698.40
  6. Step 6: Final answer
    x = 630,908,999.10

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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.