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Finding the Fourth Proportional to 661,492.36, 991,656 and 262,413.40

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Solution

The fourth proportional to 661,492.36, 991,656 and 262,413.40 is: 393,389.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,492.36 : 991,656 = 262,413.40 : x
  2. Step 2: Convert to fraction form
    661,492.36/991,656 = 262,413.40/x
  3. Step 3: Cross multiply
    661,492.36x = 991,656 × 262,413.40
  4. Step 4: Simplify right side
    661,492.36x = 260,223,822,590.40
  5. Step 5: Solve for x
    x = 260,223,822,590.40/661,492.36
  6. Step 6: Final answer
    x = 393,389.01

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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.