Home / 421,872,017.40-632,808,026.10-419,184,631.80

Finding the Fourth Proportional to 421,872,017.40, 632,808,026.10 and 419,184,631.80

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Solution

The fourth proportional to 421,872,017.40, 632,808,026.10 and 419,184,631.80 is: 628,776,947.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,872,017.40 : 632,808,026.10 = 419,184,631.80 : x
  2. Step 2: Convert to fraction form
    421,872,017.40/632,808,026.10 = 419,184,631.80/x
  3. Step 3: Cross multiply
    421,872,017.40x = 632,808,026.10 × 419,184,631.80
  4. Step 4: Simplify right side
    421,872,017.40x = 265,263,399,420,813,312
  5. Step 5: Solve for x
    x = 265,263,399,420,813,312/421,872,017.40
  6. Step 6: Final answer
    x = 628,776,947.70

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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.