Home / 387,398,047.82-534,604,887.95-211,182,155.78

Finding the Fourth Proportional to 387,398,047.82, 534,604,887.95 and 211,182,155.78

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Solution

The fourth proportional to 387,398,047.82, 534,604,887.95 and 211,182,155.78 is: 291,428,966.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,398,047.82 : 534,604,887.95 = 211,182,155.78 : x
  2. Step 2: Convert to fraction form
    387,398,047.82/534,604,887.95 = 211,182,155.78/x
  3. Step 3: Cross multiply
    387,398,047.82x = 534,604,887.95 × 211,182,155.78
  4. Step 4: Simplify right side
    387,398,047.82x = 112,899,012,727,806,336
  5. Step 5: Solve for x
    x = 112,899,012,727,806,336/387,398,047.82
  6. Step 6: Final answer
    x = 291,428,966.57

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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.