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Finding the Fourth Proportional to 615,128.80, 923,384.40 and 475,506.40

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Solution

The fourth proportional to 615,128.80, 923,384.40 and 475,506.40 is: 713,793.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,128.80 : 923,384.40 = 475,506.40 : x
  2. Step 2: Convert to fraction form
    615,128.80/923,384.40 = 475,506.40/x
  3. Step 3: Cross multiply
    615,128.80x = 923,384.40 × 475,506.40
  4. Step 4: Simplify right side
    615,128.80x = 439,075,191,860.16
  5. Step 5: Solve for x
    x = 439,075,191,860.16/615,128.80
  6. Step 6: Final answer
    x = 713,793.91

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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.