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Finding the Fourth Proportional to 647,698.40, 971,547.60 and 423,312.20

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Solution

The fourth proportional to 647,698.40, 971,547.60 and 423,312.20 is: 634,968.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,698.40 : 971,547.60 = 423,312.20 : x
  2. Step 2: Convert to fraction form
    647,698.40/971,547.60 = 423,312.20/x
  3. Step 3: Cross multiply
    647,698.40x = 971,547.60 × 423,312.20
  4. Step 4: Simplify right side
    647,698.40x = 411,267,951,960.72
  5. Step 5: Solve for x
    x = 411,267,951,960.72/647,698.40
  6. Step 6: Final answer
    x = 634,968.30

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Similar ratio
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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.