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Finding the Fourth Proportional to 661,292.40, 912,683.10 and 403,319

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Solution

The fourth proportional to 661,292.40, 912,683.10 and 403,319 is: 556,640.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,292.40 : 912,683.10 = 403,319 : x
  2. Step 2: Convert to fraction form
    661,292.40/912,683.10 = 403,319/x
  3. Step 3: Cross multiply
    661,292.40x = 912,683.10 × 403,319
  4. Step 4: Simplify right side
    661,292.40x = 368,102,435,208.90
  5. Step 5: Solve for x
    x = 368,102,435,208.90/661,292.40
  6. Step 6: Final answer
    x = 556,640.96

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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.