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Finding the Fourth Proportional to 649,938,853.64, 896,915,618 and 371,486,355.88

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Solution

The fourth proportional to 649,938,853.64, 896,915,618 and 371,486,355.88 is: 512,651,171.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    649,938,853.64 : 896,915,618 = 371,486,355.88 : x
  2. Step 2: Convert to fraction form
    649,938,853.64/896,915,618 = 371,486,355.88/x
  3. Step 3: Cross multiply
    649,938,853.64x = 896,915,618 × 371,486,355.88
  4. Step 4: Simplify right side
    649,938,853.64x = 333,191,914,462,678,144
  5. Step 5: Solve for x
    x = 333,191,914,462,678,144/649,938,853.64
  6. Step 6: Final answer
    x = 512,651,171.10

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.