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Finding the Fourth Proportional to 713,790.84, 985,036.20 and 391,503.18

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Solution

The fourth proportional to 713,790.84, 985,036.20 and 391,503.18 is: 540,277.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    713,790.84 : 985,036.20 = 391,503.18 : x
  2. Step 2: Convert to fraction form
    713,790.84/985,036.20 = 391,503.18/x
  3. Step 3: Cross multiply
    713,790.84x = 985,036.20 × 391,503.18
  4. Step 4: Simplify right side
    713,790.84x = 385,644,804,715.12
  5. Step 5: Solve for x
    x = 385,644,804,715.12/713,790.84
  6. Step 6: Final answer
    x = 540,277.04

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1.5x scale

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.