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Finding the Fourth Proportional to 652,621.20, 978,413.40 and 357,133.20

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Solution

The fourth proportional to 652,621.20, 978,413.40 and 357,133.20 is: 535,416.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    652,621.20 : 978,413.40 = 357,133.20 : x
  2. Step 2: Convert to fraction form
    652,621.20/978,413.40 = 357,133.20/x
  3. Step 3: Cross multiply
    652,621.20x = 978,413.40 × 357,133.20
  4. Step 4: Simplify right side
    652,621.20x = 349,423,908,464.88
  5. Step 5: Solve for x
    x = 349,423,908,464.88/652,621.20
  6. Step 6: Final answer
    x = 535,416.12

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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.