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Finding the Fourth Proportional to 270,249,687.30, 405,374,530.95 and 155,458,431.30

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Solution

The fourth proportional to 270,249,687.30, 405,374,530.95 and 155,458,431.30 is: 233,187,646.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    270,249,687.30 : 405,374,530.95 = 155,458,431.30 : x
  2. Step 2: Convert to fraction form
    270,249,687.30/405,374,530.95 = 155,458,431.30/x
  3. Step 3: Cross multiply
    270,249,687.30x = 405,374,530.95 × 155,458,431.30
  4. Step 4: Simplify right side
    270,249,687.30x = 63,018,888,670,460,304
  5. Step 5: Solve for x
    x = 63,018,888,670,460,304/270,249,687.30
  6. Step 6: Final answer
    x = 233,187,646.95

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1.5x scale

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.