Home / 768,209,971.55-1,152,316,728.80-442,812,190.19

Finding the Fourth Proportional to 768,209,971.55, 1,152,316,728.80 and 442,812,190.19

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Solution

The fourth proportional to 768,209,971.55, 1,152,316,728.80 and 442,812,190.19 is: 664,219,306.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    768,209,971.55 : 1,152,316,728.80 = 442,812,190.19 : x
  2. Step 2: Convert to fraction form
    768,209,971.55/1,152,316,728.80 = 442,812,190.19/x
  3. Step 3: Cross multiply
    768,209,971.55x = 1,152,316,728.80 × 442,812,190.19
  4. Step 4: Simplify right side
    768,209,971.55x = 510,259,894,470,290,240
  5. Step 5: Solve for x
    x = 510,259,894,470,290,240/768,209,971.55
  6. Step 6: Final answer
    x = 664,219,306.40

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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.