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Finding the Fourth Proportional to 708,756.48, 978,048.51 and 402,792.45

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Solution

The fourth proportional to 708,756.48, 978,048.51 and 402,792.45 is: 555,833.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    708,756.48 : 978,048.51 = 402,792.45 : x
  2. Step 2: Convert to fraction form
    708,756.48/978,048.51 = 402,792.45/x
  3. Step 3: Cross multiply
    708,756.48x = 978,048.51 × 402,792.45
  4. Step 4: Simplify right side
    708,756.48x = 393,950,555,561.75
  5. Step 5: Solve for x
    x = 393,950,555,561.75/708,756.48
  6. Step 6: Final answer
    x = 555,833.44

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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.