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Finding the Fourth Proportional to 645,547.56, 890,842.66 and 359,061.48

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Solution

The fourth proportional to 645,547.56, 890,842.66 and 359,061.48 is: 495,497.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,547.56 : 890,842.66 = 359,061.48 : x
  2. Step 2: Convert to fraction form
    645,547.56/890,842.66 = 359,061.48/x
  3. Step 3: Cross multiply
    645,547.56x = 890,842.66 × 359,061.48
  4. Step 4: Simplify right side
    645,547.56x = 319,867,283,946.74
  5. Step 5: Solve for x
    x = 319,867,283,946.74/645,547.56
  6. Step 6: Final answer
    x = 495,497.63

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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.