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Finding the Fourth Proportional to 713,864.78, 985,124.09 and 407,937.69

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Solution

The fourth proportional to 713,864.78, 985,124.09 and 407,937.69 is: 562,948.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    713,864.78 : 985,124.09 = 407,937.69 : x
  2. Step 2: Convert to fraction form
    713,864.78/985,124.09 = 407,937.69/x
  3. Step 3: Cross multiply
    713,864.78x = 985,124.09 × 407,937.69
  4. Step 4: Simplify right side
    713,864.78x = 401,869,243,598.26
  5. Step 5: Solve for x
    x = 401,869,243,598.26/713,864.78
  6. Step 6: Final answer
    x = 562,948.70

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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.