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Finding the Fourth Proportional to 645,271.86, 890,495.73 and 358,804.02

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Solution

The fourth proportional to 645,271.86, 890,495.73 and 358,804.02 is: 495,160.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,271.86 : 890,495.73 = 358,804.02 : x
  2. Step 2: Convert to fraction form
    645,271.86/890,495.73 = 358,804.02/x
  3. Step 3: Cross multiply
    645,271.86x = 890,495.73 × 358,804.02
  4. Step 4: Simplify right side
    645,271.86x = 319,513,447,716.84
  5. Step 5: Solve for x
    x = 319,513,447,716.84/645,271.86
  6. Step 6: Final answer
    x = 495,160.98

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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.