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Finding the Fourth Proportional to 290,506,972.15, 400,903,605.03 and 158,347,684.53

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Solution

The fourth proportional to 290,506,972.15, 400,903,605.03 and 158,347,684.53 is: 218,521,975.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,506,972.15 : 400,903,605.03 = 158,347,684.53 : x
  2. Step 2: Convert to fraction form
    290,506,972.15/400,903,605.03 = 158,347,684.53/x
  3. Step 3: Cross multiply
    290,506,972.15x = 400,903,605.03 × 158,347,684.53
  4. Step 4: Simplify right side
    290,506,972.15x = 63,482,157,575,221,512
  5. Step 5: Solve for x
    x = 63,482,157,575,221,512/290,506,972.15
  6. Step 6: Final answer
    x = 218,521,975.93

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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.