Home / 640,872,024.40-961,308,036.60-425,461,272.40

Finding the Fourth Proportional to 640,872,024.40, 961,308,036.60 and 425,461,272.40

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Solution

The fourth proportional to 640,872,024.40, 961,308,036.60 and 425,461,272.40 is: 638,191,908.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,872,024.40 : 961,308,036.60 = 425,461,272.40 : x
  2. Step 2: Convert to fraction form
    640,872,024.40/961,308,036.60 = 425,461,272.40/x
  3. Step 3: Cross multiply
    640,872,024.40x = 961,308,036.60 × 425,461,272.40
  4. Step 4: Simplify right side
    640,872,024.40x = 408,999,340,420,181,760
  5. Step 5: Solve for x
    x = 408,999,340,420,181,760/640,872,024.40
  6. Step 6: Final answer
    x = 638,191,908.60

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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.