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Finding the Fourth Proportional to 385,365.80, 578,048.70 and 369,619.40

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Solution

The fourth proportional to 385,365.80, 578,048.70 and 369,619.40 is: 554,429.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,365.80 : 578,048.70 = 369,619.40 : x
  2. Step 2: Convert to fraction form
    385,365.80/578,048.70 = 369,619.40/x
  3. Step 3: Cross multiply
    385,365.80x = 578,048.70 × 369,619.40
  4. Step 4: Simplify right side
    385,365.80x = 213,658,013,664.78
  5. Step 5: Solve for x
    x = 213,658,013,664.78/385,365.80
  6. Step 6: Final answer
    x = 554,429.10

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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.